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ASIN

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Returns the arcsine, or inverse sine, of a number. The arcsine is the angle whose sine is number . The returned angle is given in radians in the range -pi/2 to pi/2.

Syntax

ASIN ( number )

Number is the sine of the angle you want and must be from -1 to 1.

Remark

To express the arcsine in degrees, multiply the result by 180/PI() or use the DEGREES function.

Formula

Description (Result)

=ASIN(-0.5)

Arcsine of -0.5 in radians, -pi/6 (-0.5236)

=ASIN(-0.5)*180/PI()

Arcsine of -0.5 in degrees (-30)

=DEGREES(ASIN(-0.5))

Arcsine of -0.5 in degrees (-30)

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