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2sin^225/4π+tan^2(-11/3π)*cot(-7/4π)
人气:108 ℃ 时间:2020-09-25 14:25:36
解答
2sin^225/4π+tan^2(-11/3π)*cot(-7/4π)
=2sin(π/4)^2+tan(π/3)^2*cot(π/4)^2
=1+3
=4
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