已知tan(a-兀/4)=3,求tana
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已知tan(a-兀/4)=3,求tana已知tan(a-兀/4)=3,求tana已知tan(a-兀/4)=3,求tanatan(a-π/4)=3(tana-tanπ/4)/(1+tanatanπ/4)
已知tan(a-兀/4)=3,求tana
已知tan(a-兀/4)=3,求tana
已知tan(a-兀/4)=3,求tana
tan(a-π/4)=3
(tana-tanπ/4)/(1+tanatanπ/4) = 3
(tana-1)/(1+tana) = 3
tana-1=3+3tana
2tana=-4
tana=-2