RADIANS

RADIANS(angle) turns degrees into radians, which SIN, COS and TAN require: =SIN(RADIANS(30)) is 0.5. Worked examples both ways. Matches Excel.

Syntax

RADIANS(angle)

Argument	Required	Description
`angle`	Required	An angle in degrees.

Examples

Every example below was executed against VisiGrid engine 0.54.0 — not transcribed from another vendor's documentation. Reproduce any of them with vgrid calc.

Formula	Result	Notes
`=RADIANS(180)`	`3.14`	Half a turn is π radians.
`=SIN(RADIANS(30))`	`0.50`	Convert on the way in, and SIN gets the angle it expects.
`=RADIANS(360)=2*PI()`	`TRUE`

Why the conversion is needed

SIN, COS and TAN measure angles in radians, where a full turn is 2π rather than 360. Handing them degrees is not an error — it is a different angle — so the mistake produces a confident wrong number. Wrap any angle a person typed in degrees:

=COS(RADIANS(60))  → 0.50

It is exactly angle*PI()/180. The reverse conversion is DEGREES.

Excel compatibility

Matches Excel.