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Question

Find the value of tan2θ+1tan2θ if tanθ+1tanθ=2

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Solution

Given,
tanθ+1tanθ=2
Squaring both sides we get
(tanθ+1tanθ)2=4
tan2θ+1tan2θ+2tanθ.1tanθ=4
tan2θ+1tan2θ+2=4
tan2θ+1tan2θ=2

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