all Python 3mathterm

math.radians

trigonometry

Converts an angle from degrees to radians. math.radians(180) → 3.14159... Needed by the trigonometric functions.

Syntax

math.radians(x)

Every trigonometric function in math expects radians and has no way to warn you otherwise: math.sin(30) does not fail, it returns the sine of 30 radians — a normal-looking number that silently breaks the answer. Convert at the call site instead: math.sin(math.radians(30)).

Examples

import math
print(math.radians(180))  # → 3.14159...
print(math.radians(90))   # → 1.5707...
print(math.radians(0))    # → 0.0
print(math.radians(360))  # → 6.2831...
print(math.radians(45))   # → 0.7853...
print(math.radians(60))   # → 1.0471...

See also

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