Difference between revisions of "Documentation/How Tos/Calc: ATAN2 function"

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|booktitle=<div style="padding: 8px; font-size: 140%; font-weight: bold; background-color: #9BC0F5;">CALC FUNCTIONS</div>
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|ShowParttitle=block|parttitle=[[Documentation/How_Tos/Calc:_Mathematical_functions|<div style="font-size: 140%;">Mathematical Functions]]
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|toccontent= <div style="padding: 4px; font-size: 130%; font-weight: hidden; background-color:#DCE9FC;">FUNCTIONS</div>
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Trigonometric</div>
 
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* [[Documentation/How_Tos/Calc:_COS_function|<div style="font-size: 120%;">Cos]]
 
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* [[Documentation/How_Tos/Calc:_SIN_function|<div style="font-size: 120%;">Sin]]
 
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* [[Documentation/How_Tos/Calc:_TAN_function|<div style="font-size: 120%;">Tan]]
 
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* [[Documentation/How_Tos/Calc:_COT_function|<div style="font-size: 120%;">Cot]]
 
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* [[Documentation/How_Tos/Calc:_ACOS_function|<div style="font-size: 120%;">Acos]]
 
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* [[Documentation/How_Tos/Calc:_ACOT_function|<div style="font-size: 120%;">Acot]]
 
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* [[Documentation/How_Tos/Calc:_ASIN_function|<div style="font-size: 120%;">Asin]]
 
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* [[Documentation/How_Tos/Calc:_ATAN_function|<div style="font-size: 120%;">Atan]]
 
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* [[Documentation/How_Tos/Calc:_ATAN2_function|<div style="font-size: 120%; border-style: double; border-color:#778899;">Atan2]]
 
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* [[Documentation/How_Tos/Calc:_DEGREES_function|<div style="font-size: 120%;">Degrees]]
 
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* [[Documentation/How_Tos/Calc:_RADIANS_function|<div style="font-size: 120%;">Radians]]
 
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* [[Documentation/How_Tos/Calc:_PI_function|<div style="font-size: 120%;">Pi]]
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Hyperbolic</div>
 
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* [[Documentation/How_Tos/Calc:_COSH_function|<div style="font-size: 120%;">Cosh]]
 
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* [[Documentation/How_Tos/Calc:_SINH_function|<div style="font-size: 120%;">Sinh]]
 
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* [[Documentation/How_Tos/Calc:_TANH_function|<div style="font-size: 120%;">Tanh]]
 
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* [[Documentation/How_Tos/Calc:_COTH_function|<div style="font-size: 120%;">Coth]]
 
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* [[Documentation/How_Tos/Calc:_ACOSH_function|<div style="font-size: 120%;">Acosh]]
 
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* [[Documentation/How_Tos/Calc:_ACOTH_function|<div style="font-size: 120%;">Acoth]]
 
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* [[Documentation/How_Tos/Calc:_ASINH_function|<div style="font-size: 120%;">Asinh]]
 
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* [[Documentation/How_Tos/Calc:_ATANH_function|<div style="font-size: 120%;">Atanh]]
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Rounding and remainders</div>
 
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* [[Documentation/How_Tos/Calc:_TRUNC_function|<div style="font-size: 120%;">Trunc]]
 
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* [[Documentation/How_Tos/Calc:_ROUND_function|<div style="font-size: 120%;">Round]]
 
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* [[Documentation/How_Tos/Calc:_ROUNDDOWN_function|<div style="font-size: 120%;">Rounddown]]
 
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* [[Documentation/How_Tos/Calc:_ROUNDUP_function|<div style="font-size: 120%;">Roundup]]
 
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* [[Documentation/How_Tos/Calc:_CEILING_function|<div style="font-size: 120%;">Ceiling]]
 
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* [[Documentation/How_Tos/Calc:_FLOOR_function|<div style="font-size: 120%;">Floor]]
 
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* [[Documentation/How_Tos/Calc:_EVEN_function|<div style="font-size: 120%;">Even]]
 
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* [[Documentation/How_Tos/Calc:_ODD_function|<div style="font-size: 120%;">Odd]]
 
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* [[Documentation/How_Tos/Calc:_MROUND_function|<div style="font-size: 120%;">Mround]]
 
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* [[Documentation/How_Tos/Calc:_INT_function|<div style="font-size: 120%;">Int]]
 
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* [[Documentation/How_Tos/Calc:_QUOTIENT_function|<div style="font-size: 120%;">Quotient]]
 
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* [[Documentation/How_Tos/Calc:_MOD_function|<div style="font-size: 120%;">Mod]]
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Logarithm/Powers</div>
 
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* [[Documentation/How_Tos/Calc:_EXP_function|<div style="font-size: 120%;">Exp]]
 
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* [[Documentation/How_Tos/Calc:_POWER_function|<div style="font-size: 120%;">Power]]
 
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* [[Documentation/How_Tos/Calc:_LOG_function|<div style="font-size: 120%;">Log]]
 
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* [[Documentation/How_Tos/Calc:_LN_function|<div style="font-size: 120%;">Ln]]
 
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* [[Documentation/How_Tos/Calc:_LOG10_function|<div style="font-size: 120%;">Log10]]
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Bessel functions</div>
 
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* [[Documentation/How_Tos/Calc:_BESSELI_function|<div style="font-size: 120%;">Besseli]]
 
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* [[Documentation/How_Tos/Calc:_BESSELJ_function|<div style="font-size: 120%;">Besselj]]
 
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* [[Documentation/How_Tos/Calc:_BESSELK_function|<div style="font-size: 120%;">Besselk]]
 
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* [[Documentation/How_Tos/Calc:_BESSELY_function|<div style="font-size: 120%;">Bessely]]
 
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Miscellaneous</div>
 
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* [[Documentation/How_Tos/Calc:_ABS_function|<div style="font-size: 120%;">Abs]]
 
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* [[Documentation/How_Tos/Calc:_COMBIN_function|<div style="font-size: 120%;">Combin]]
 
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* [[Documentation/How_Tos/Calc:_COMBINA_function|<div style="font-size: 120%;">Combina]]
 
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* [[Documentation/How_Tos/Calc:_CONVERT_function|<div style="font-size: 120%;">Convert]]
 
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* [[Documentation/How_Tos/Calc:_CONVERT_ADD_function|<div style="font-size: 120%;">Convert Add]]
 
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* [[Documentation/How_Tos/Calc:_COUNTBLANK_function|<div style="font-size: 120%;">Countblank]]
 
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* [[Documentation/How_Tos/Calc:_COUNTIF_function|<div style="font-size: 120%;">Countif]]
 
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* [[Documentation/How_Tos/Calc:_DELTA_function|<div style="font-size: 120%;">Delta]]
 
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* [[Documentation/How_Tos/Calc:_ERF_function|<div style="font-size: 120%;">Erf]]
 
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* [[Documentation/How_Tos/Calc:_ERFC_function|<div style="font-size: 120%;">Erfc]]
 
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* [[Documentation/How_Tos/Calc:_FACT_function|<div style="font-size: 120%;">Fact]]
 
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* [[Documentation/How_Tos/Calc:_FACTDOUBLE_function|<div style="font-size: 120%;">Factdouble]]
 
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* [[Documentation/How_Tos/Calc:_GCD_function|<div style="font-size: 120%;">Gcd]]
 
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* [[Documentation/How_Tos/Calc:_GCD_ADD_function|<div style="font-size: 120%;">Gcd Add]]
 
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* [[Documentation/How_Tos/Calc:_GESTEP_function|<div style="font-size: 120%;">Gestep]]
 
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* [[Documentation/How_Tos/Calc:_ISEVEN_function|<div style="font-size: 120%;">Iseven]]
 
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* [[Documentation/How_Tos/Calc:_ISODD_function|<div style="font-size: 120%;">Isodd]]
 
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* [[Documentation/How_Tos/Calc:_LCM_function|<div style="font-size: 120%;">Lcm]]
 
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* [[Documentation/How_Tos/Calc:_LCM_ADD_function|<div style="font-size: 120%;">Lcm Add]]
 
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* [[Documentation/How_Tos/Calc:_MULTINOMIAL_function|<div style="font-size: 120%;">Multinomial]]
 
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* [[Documentation/How_Tos/Calc:_PRODUCT_function|<div style="font-size: 120%;">Product]]
 
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* [[Documentation/How_Tos/Calc:_RAND_function|<div style="font-size: 120%;">Rand]]
 
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* [[Documentation/How_Tos/Calc:_RANDBETWEEN_function|<div style="font-size: 120%;">Randbetween]]
 
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* [[Documentation/How_Tos/Calc:_SERIESSUM_function|<div style="font-size: 120%;">Seriessum]]
 
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* [[Documentation/How_Tos/Calc:_SIGN_function|<div style="font-size: 120%;">Sign]]
 
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* [[Documentation/How_Tos/Calc:_SQRT_function|<div style="font-size: 120%;">Sqrt]]
 
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* [[Documentation/How_Tos/Calc:_SQRTPI_function|<div style="font-size: 120%;">Sqrtpi]]
 
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* [[Documentation/How_Tos/Calc:_SUBTOTAL_function|<div style="font-size: 120%;">Subtotal]]
 
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* [[Documentation/How_Tos/Calc:_SUM_function|<div style="font-size: 120%;">Sum]]
 
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* [[Documentation/How_Tos/Calc:_SUMIF_function|<div style="font-size: 120%;">Sumif]]
 
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* [[Documentation/How_Tos/Calc:_SUMSQ_function|<div style="font-size: 120%;">Sumsq]]
 
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}}__TOC__
 
  
 
== ATAN2 ==
 
== ATAN2 ==
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Returns the inverse tangent (the arctangent) for specified x and y coordinates.
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Returns the inverse tangent (the arc tangent) for specified x and y coordinates.
  
 
=== Syntax: ===
 
=== Syntax: ===

Latest revision as of 14:23, 31 January 2024

ATAN2

Returns the inverse tangent (the arc tangent) for specified x and y coordinates.

Syntax:

ATAN2(x_coord; y_coord)

x_coord is the value of the x coordinate.
y_coord is the value of the y coordinate.
ATAN2 returns the inverse trigonometric tangent, that is, the angle (in radians) between the x-axis and a line from point x_coord, y_coord to the origin. The angle returned is between -PI and PI.
To return the angle in degrees, use the DEGREES function.

Example:

ATAN2(20; 20)

returns 0.785398163397448 (PI/4 radians).

DEGREES(ATAN2(12.3; 12.3))

returns 45. The tangent of 45 degrees is 1.


See Also

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