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.
Note: Use the F9 key or click the 'three dot box' at the right edge of the parameter field to open the Default Element Selection Tool (the Element Picker or the Element Browser) or use the Down-Arrow key (Auto-Complete) on any parameter field to see a complete list of the memory locations that are valid for that parameter of the instruction.
Result specifies a location to store the result of the calculation. This can be any writable numeric location.
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
Related Topics:
DEG - Convert Radians to Degrees
RAD - Convert Degrees to Radians
Rung Example:
