若tan2θ=-2√2,π/2
问题描述:
若tan2θ=-2√2,π/2
答
tan2θ= 2tanθ/(1-tan^2(θ)) = -2根号2
π/2
若tan2θ=-2√2,π/2
tan2θ= 2tanθ/(1-tan^2(θ)) = -2根号2
π/2