Functions Reference

Chapter 16
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Trigonometric functions 205
Chapter 16
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.
Acos
Format
Acos (number)
Parameter
number - any numeric expression
or field containing a numeric expression in the range
-1 to 1.
Data type returned
number
Description
Returns the arccosine, or inverse cosine, of a number. The arccosine is the angle whose
cosine is number. The returned angle is given in radians in the range 0 (zero) to Pi. The
input number parameter must be between -1 and 1.
If you want to convert the result from radians to degrees, multiply it by 180/Pi or use the
Degrees function, page 207.
This function Returns
Acos, page 205 The arccosine, or inverse cosine, of a number.
Asin, page 206 The arcsine, or inverse sine, of a number.
Atan, page 206 The trigonometric arc tangent (inverse tangent) of radians.
Cos, page 207 The cosine of the specified angle.
Degrees, page 207 Degrees, converted from the specified radians.
Pi, page 208 The value of the constant Pi, which is approximately 3.14159.
Radians, page 208 Radians, converted from the specified degrees.
Sin, page 209 The sine of the specified angle.
Tan, page 210 The tangent of the specified angle.