Function cos() calculates the cosine value of a radian.

Arguments：

• Radian <number>

Returns：

• Cosine <number>, ∈ [-1, 1]

Common Usage

Example: Calculate the cosine value of degree 60°

return cos(60 * pi() / 180)

0.5

Example: Calculate the cosine value of each row (radian) of an alias

uncollect [1, 2.5, 3] as a
return cos(a)

0.54030230586814
-0.801143615546934
-0.989992496600445