radians

Use the radians function in APL to convert an angle from degrees to radians. The conversion formula is radians = (π / 180) × angle_in_degrees.

radians is useful as a preprocessing step before calling trigonometric functions such as sin, cos, or tan, which all expect their input in radians. If you have angle data in degrees, pass it through radians before applying any trigonometric operation.

Usage

Syntax

radians(a)

Parameters

Returns

The angle in radians corresponding to the input degree value.

Example

Use radians to convert an angle in degrees to radians.

Query

print result = radians(180)

Output

List of related functions

• degrees: Converts radians to degrees. Use it for the inverse conversion after trigonometric computations.
• pi: Returns the constant π. Use it when you want to compute radian conversions manually instead of using radians.
• sin: Returns the sine of an angle in radians. Use radians to prepare degree inputs before calling sin.
• cos: Returns the cosine of an angle in radians. Use radians to prepare degree inputs before calling cos.
• tan: Returns the tangent of an angle in radians. Use radians to prepare degree inputs before calling tan.

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