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傳回數字的反正弦或正弦的倒數。反正弦是一種角度,它的正弦是一個數字。傳回的角度是以弧度表示,有效範圍是 -pi/2 到 pi/2。

語法

ASIN(number)

Number     係指您要的角度正弦,有效範圍是 -1 到 1。

備註

若要以角度來表示反正弦值,請將結果乘上 180/PI() 或使用 DEGREES 函數。

範例

公式

說明 (結果)

=ASIN(-0.5)

-0.5 的反正弦值,以弧度表示,-pi/6 (-0.5236)

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

-0.5 的反正弦值,以角度表示 (-30)

=DEGREES(ASIN(-0.5))

-0.5 的反正弦值,以角度表示 (-30)

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