Difference between revisions of "Documentation/How Tos/Calc: ATAN function"
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== ATAN == | == ATAN == | ||
Returns the inverse tangent (the arctangent) of a number. | Returns the inverse tangent (the arctangent) of a number. | ||
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=== Syntax: === | === Syntax: === | ||
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: To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function. | : To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function. | ||
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=== Example: === | === Example: === | ||
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<tt>'''DEGREES(ATAN(1))'''</tt> | <tt>'''DEGREES(ATAN(1))'''</tt> | ||
: returns <tt>'''45'''</tt>. The tangent of <tt>'''45'''</tt> degrees is <tt>'''1'''</tt>. | : returns <tt>'''45'''</tt>. The tangent of <tt>'''45'''</tt> degrees is <tt>'''1'''</tt>. | ||
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=== See also: === | === See also: === | ||
Revision as of 06:39, 2 March 2008
ATAN
Returns the inverse tangent (the arctangent) of a number.
Syntax:
ATAN(number)
- returns the inverse trigonometric tangent of number, in other words the angle (in radians) whose tangent is number. The angle returned is between -PI/2 and PI/2.
- To return the angle in degrees, use the DEGREES function.
Example:
ATAN(1)
- returns 0.785398163397448 (PI/4 radians).
DEGREES(ATAN(1))
- returns 45. The tangent of 45 degrees is 1.
