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傳回一角度的正弦值。

語法

SIN(number)

Number     是用以計算正弦值的角度 (以弳度表示)。

註解

如果角的大小以角度表示,請乘以 PI()/180 或是使用 RADIANS 函數將它轉換成弧度。

範例

公式

說明 (結果)

=SIN(PI())

弧度 pi 的正弦值 (0,近似值)

=SIN(PI()/2)

弧度 pi/2 的正弦值 (1)

=SIN(30*PI()/180)

30 度的正弦值 (0.5)

=SIN(RADIANS(30))

30 度的正弦值 (0.5)

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