已知tan2θ=3/4(π/2
问题描述:
已知tan2θ=3/4(π/2
答
解
tan2θ=(2tanθ)/(1-tan^2θ)=3/4
即3(1-tan^2θ)=8tanθ
即3tan^2θ+8tanθ-3=0
(3tanθ-1)(tanθ+3)=0
∵π/2