cosθ=-3/5.π＜θ＜3π/2
那么sinθ=-4/5
（sinθ/2-cosθ/2）平方
=(sinθ/2)^2-2sinθ/2cosθ/2+(cosθ/2)^2
=1-sinθ
=1+4/5
=9/5
已知cosθ=-3/5.π＜θ＜3π/2,求（sinθ/2-cosθ/2）平方 的值
已知cosθ=-3/5.π＜θ＜3π/2,求（sinθ/2-cosθ/2）平方 的值
数学人气：500 ℃时间：2020-02-03 12:41:27
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