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math.cos

math.cos(x) -> number

Return the cosine of x, in radians.

Parameters

  • x: any — the angle in radians

Returns

  • number — the cosine of x, as a float

Examples

assert(math.cos(0) == 1.0)
print(math.cos(math.pi))        --> -1.0 (approximately)

output:

-1.0