ATAN function
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Trigonometric
Hyperbolic
Rounding and remainders
Logarithm/Powers
Bessel functions
Miscellaneous
ATAN
Returns the inverse tangent (the arc tangent) 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.
See Also
