sin^2(x/2)]*[cos^2(x/2)]等于多少啊
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发布时间:2024-02-28 00:36
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热心网友
时间:2024-11-14 01:10
[sin^2(x/2)]*[cos^2(x/2)]
=[sin(x/2)cos(x/2)]^2
=[(1/2)*2*sin(x/2)cos(x/2)]^2
=[(1/2)sinx]^2
=(1/4)(sinx)^2
热心网友
时间:2024-11-14 01:10
sin^2(x/2)]*[cos^2(x/2)]
=(sinx/2cosx/2)^2
=(1/2*2sinx/2cosx/2)^2
=sinx^2/4