问题
解答题
化简:
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答案
=cos(θ+4π)cos2(θ+π)sin2(θ+3π) sin(θ-4π)sin(5π+θ)cos2(-θ-π)
=-cosθ.cosθ•cos2θ•sin2θ sinθ•(-sinθ)•cos2θ
化简:
|
=cos(θ+4π)cos2(θ+π)sin2(θ+3π) sin(θ-4π)sin(5π+θ)cos2(-θ-π)
=-cosθ.cosθ•cos2θ•sin2θ sinθ•(-sinθ)•cos2θ