Cos

Cos(expr)

returns the cosine of expr (measured in radians). Cos(expr) will evaluate automatically in the case expr is a multiple of Pi, Pi/2, Pi/3, Pi/4 and Pi/6.

See:

• Wikipedia - Trigonometric functions
• Wikipedia - Radian
• Wikipedia - Degree

Examples

>> Cos(0)
1

>> Cos(3*Pi)
-1

>> Cos(1.5*Pi)
-1.8369701987210297E-16

Implementation status

• ✅ - full supported

Github

• Implementation of Cos

• Rule definitions of Cos