Topic: DMD0090

COS - Cosine of Radian Angle

This instruction can only be used in the Expression parameter of the Calculate Expression (MATH) instruction.

The Cosine of Radian Angle (COS) function will compute the cosine of its only expression parameter.

The expression parameter consists of all the text between the bounding parentheses. Any expression parameter can be a constant value, a bit or numeric memory location, an arithmetic expression, and/or mathematical function or other expressions up to a maximum of 1024 characters. Expressions can be nested, so use of parentheses is recommended to ensure proper evaluation order.

The range of acceptable input values is any real or integer number. Angles expressed in degrees must first be converted to radians with the RAD - Convert Degrees to Radians instruction, for example, if the angle R1 is in degrees use COS( RAD( R1 ) ).

The range of output values will be -1.0 to +1.0.

Some examples:

COS( PI() ) = -1.0

COS( PI() / 2.0 ) = 0.0

COS( 0.0 ) = +1.0

See Also:

• COS - Cosine of Radian Angle

• SIN - Sine of Radian Angle

• TAN - Tangent of Radian Angle
   

• ACOS - Arccosine in Radians

• ASIN - Arcsine in Radians

• ATAN - Arctangent in Radians

Related Topics:

• MATH - Calculate Expression
   

• DEG - Convert Radians to Degrees
   

• RAD - Convert Degrees to Radians

Rung Example: