Reference · Math

math.sin

math.sin(num) -> float

What it does

The sine of an angle in radians, as a float, as Python's math.sin. An angle in degrees is converted first with math.radians.

Examples

print(math.sin(0), math.sin(math.pi / 2), math.sin(1))print(math.sin(math.radians(90)), math.sin(math.radians(30)))

0.0 1.0 0.84147098480789651.0 0.49999999999999994

Edge cases

• Floating point: math.sin(math.pi) is about 1.2e-16, not 0, and the sine of 30 degrees is 0.49999999999999994. Round when a clean figure is wanted.
• A huge angle is still reduced exactly, as Python does: math.sin(1e22) is -0.8522008497671888.
• NaN gives NaN; an infinite angle is a domain error.

print(math.sin(math.pi), round(math.sin(math.pi), 12))print(math.sin(math.radians(30)), round(math.sin(math.radians(30)), 10))print(math.sin(1e22), math.sin(math.nan))

0.00000000000000012246467991473532 0.00.49999999999999994 0.5-0.8522008497671888 NaN

Errors

inf or -inf is a runtime error (a domain error), not an error value: it stops the request. A value that is not a number is a runtime error too; a decimal is converted first with float.

print(math.sin(math.inf))

line 1: `math.sin`: math domain error (inf)

print(math.sin("0"))

line 1: `math.sin` expects a number as argument 1, got str

Chaining

print(90 | math.radians | math.sin)print([0, 30, 90] | map(math.radians) | map(math.sin) | map((x) => round(x, 10)))

1.0[0.0, 0.5, 1.0]

See also

math.cos, math.tan, math.asin, math.radians, math.sinh

Edit this page on GitHub · every example's output was made by running it (tools/refcheck.mjs) · questions on Discord or r/quillo