Prove: √sec2θ+cosec2θ = tanθ+cotθ
LHS = √sec2θ+cosec2θ = √(1+tan2θ)+(1+cot2θ) = √tan2θ+cot2θ+2tanθcotθ
= √(tanθ+cotθ)2 = tanθ+cotθ = RHS
Hence,proved.
If θ is acute angle, and tan θ =1√7, then cosec2θ−sec2θcosec2θ+sec2θ=