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Excel ASIN Function

Excel ASIN function

The Excel ASIN function returns the arcsin of a number.

Get the angle of a triangle.
Return value 
Angle in Radians
=ASIN (number)
  • number - The ratio of the opposite-side over the hypotenuse of a right-triangle.
Usage notes 

ARCSIN expects an input between -1 and 1, where the input is a ratio of the opposite-side over the hypotenuse of a right triangle.

ASIN Right-Triangle
θ = ASIN(opposite/adjacent) // Where θ is the angle


ARCSIN( ratio) is the inverse of SIN(angle)

= angle = ARCSIN( SIN(angle))

Return Type

To convert from radians to degrees multiply by 180/pi() or use the DEGREES function.

= angle * 180/PI()
= DEGREES( angle)

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