已知tan2θ=3/4（π/2
来源：学生学帮网 编辑：学帮网 时间：2024/05/29 23:57:00
已知tan2θ=3/4（π/2
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
已知tan2θ=3/4（π/2
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