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Trigonometric functions

Trigonometric functions are used to calculate degrees, angles, and other geometric data.

Note  All trigonometric functions use radians as the unit of measure. Once you have a result, you can convert the radians into degrees using the Degrees function.

Click a function name for details.

 

This function	Returns
Acos	The arccosine, or inverse cosine, of a number.
Asin	The arcsine, or inverse sine, of a number.
Atan	The trigonometric arc tangent, or inverse tangent, of a number.
Cos	The cosine of the specified angle.
Degrees	Degrees, converted from the specified radians.
Pi	The value of the constant Pi, which is approximately 3.14159.
Radians	Radians, converted from the specified degrees.
Sin	The sine of the specified angle.
Tan	The tangent of the specified angle.