Translations:Documentation/Calc Functions/ASIN/18/en

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Formula Description Returns
=ASIN(0) Inverse trigonometric sine of 0 0 (radians)
=ASIN(1) Inverse trigonometric sine of 1 1.5707963267949 (PI/2 radians or π/2)
=DEGREES(ASIN(0.5)) Inverse trigonometric sine of 0.5. Further, converting angle in radians to degrees. 30° (degrees)
=ASIN(-0.5)*180/PI() Inverse trigonometric sine of -0.5. Further, converting angle in radians to degrees by multiplying by 180/PI(). -30° (degrees)
=ASIN(2) Inverse trigonometric sine of 2 will return an invalid numeric value (#NUM!) error because 2 is out of its domain. #NUM!