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Math function
ASIN
Returns the arcsine of a number, in radians.
Rarely usedDifficulty 1250 · ProficientUsage rank #275 of 520
When to use it
Inverse sine. Returns the angle in radians whose sine is the argument, between -pi/2 and pi/2.
The shape of it
- Syntax
=ASIN(number)
Worked examples
Half
=ASIN(0.5) → 0.523598776
Pi over six.
In degrees
=DEGREES(ASIN(0.5)) → 30
In degrees.
One
=ASIN(1) → 1.570796327
Pi over two.
Worth knowing
- Angle of elevation from a height and a hypotenuse: ASIN(height/length).
- Input must be between -1 and 1.
- Wrap in DEGREES for readability.
Where it goes wrong
- #NUM! outside -1 to 1.
- Returns radians.
Related
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