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已知tan(-a-4π/3)=-5,则tan(π/3+a)的值为
人气:390 ℃ 时间:2020-06-22 13:11:23
解答

tan(-a-4π/3)
=tan[-(a+4π/3)]
=-tan(a+4π/3)
=-tan(a+π+π/3)
=-tan(a+π/3)
=-5

∴tan(a+π/3)=5
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