展开 (2(1-cos(α)))/(sec(α)-1)

解答

展开

\frac{2 ( 1 - cos ( α ) )}{sec ( α ) - 1}

\frac{2 - 2 cos ( α )}{sec ( α ) - 1}

求解步骤

\frac{2 ( 1 - cos ( α ) )}{sec ( α ) - 1}

乘开

2 (1 - cos (α)) : 2 - 2 cos (α)

= \frac{2 - 2 cos ( α )}{sec ( α ) - 1}

s im pl i f y (2 a - 5) (72 a - 5)

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