# Trig Functions

Version Ref: 4.8

Function | Description
ASIN(xx) | Returns Arcsine for angle in radians.
ACOS(xx) | Returns Arccosine for angle in radians.
ATAN(xx) | Returns Arctangent for angle in radians.
ATAN(ry,rx) | Returns Arctangent for sides in radians.
DASIN(xx) | Returns Arcsine for angle in degrees.
DACOS(xx) | Returns Arccosine for angle in degrees.
DATAN(xx) | Returns Arctangent for angle in degrees.
DATAN(dy,dx) | Returns Arctangent for sides in degrees.
DSIN(xx) | Returns sine for angle in degrees.
DCOS(xx) | Returns cosine for angle in degrees.
DTAN(xx) | Returns tangent for angle in degrees.
SIN(xx) | Returns sine for angle in radians.
COS(xx) | Returns cosine for angle in radians.
TAN(xx) | Returns tangent for angle in radians.
DTOR(xx) | Converts angle in degrees to radians.
RTOD(xx) | Converts angle in radians to degrees.
PI() | Returns the value of PI or 3.14159265

Note:

ATAN/DATAN functions can be used with a single or two parameters. Using ATAN(o,a) and DATAN(o,a) with two parameters provides for entering two sides of the right triangle in the function instead of entering the tangent value. For example, with a 3,4,5 triangle, where the two legs are 3 and 4, then entering ATAN(3,4) will return .6435011 and DATAN(3,4) returns 36.86989765. The functions are calculating the angle formed by the hypotenuse and the side opposite ("o" leg). To calculate the angle formed by the hypotenuse and side adjacent ("a" leg), you can switch the parameters.