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y=2cosx/2(sinx/2+cosx/2)化简
人气:374 ℃ 时间:2019-12-13 16:34:45
解答
y=2(cosx/2)(sin(x/2)+cos(x/2))
=sinx+2(cos(x/2))^2
=sinx+cosx+1
=√2sin(x+π/4)+1
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