已知tan(-a-4π⼀3)=-5,则tan(π⼀3+a)的值为

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2025-02-01 00:55:17
推荐回答(2个)
回答1:

因为tan(-a)=-tana,
tan(π+a)=tana
已知tan(-a-4π/3)=-tan(-a-4π/3)=-5,
则tan(4π/3+a)=5
tan(4π/3+a)=5
tan(π+π/+a)=5
所以,tan(π/3+a)=5

回答2:


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