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sin(θ -5π)/tan(3π-θ)*cot(π/2-θ)/tan(θ -3/2π)*cos(8π-θ)/sin(-θ-4π)化简
人气:247 ℃ 时间:2020-04-03 19:49:26
解答
=sinθ /(-tanθ)*(-cotθ)/tanθ*cosθ/(-sinθ)
=-(cosθ)^2/sinθ
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