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2cos(x/2)(3^(1/2)sin(x/2)-cos(x/2))怎么化简?
人气:369 ℃ 时间:2020-10-01 01:31:56
解答
2cos(x/2)(3^(1/2)sin(x/2)-cos(x/2))
=2√3cosx/2sinx/2-2(cosx/2)^2
=√3sinx-cosx-1
=2sin(x-π/6)-1
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