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Math function
RADIANS
Converts degrees to radians.
Rarely usedDifficulty 1000 · CapableUsage rank #240 of 520
When to use it
Converts degrees to radians, which is what SIN, COS, and TAN expect.
The shape of it
- Syntax
=RADIANS(angle)
Worked examples
Half a turn
=RADIANS(180) → 3.141592654
Half a turn is pi.
Right angle
=RADIANS(90) → 1.570796327
A right angle.
Inside a trig call
=SIN(RADIANS(30)) → 0.5
The usual pattern: convert, then take the trig function.
Worth knowing
- Always wrap degree inputs in RADIANS before trig; it is the most common trig bug.
- RADIANS(x) = x*PI()/180.
- DEGREES converts back.
Where it goes wrong
- Text degrees with a ° symbol return #VALUE!; strip it first.
- No error when you forget it, just wrong answers.
Related
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