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Question

If tanθ=12 and tanϕ=13 ,then the value of tan(θ+ϕ) is?

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Solution

tanθ=12,tanϕ=13
tan(θ+ϕ)=tanθ+tanϕ1tanθ.tanϕ
=12+13112×13=3+26616
=55
tan(θ+ϕ)=1
(θ+ϕ)=tan1(1)
(θ+ϕ)=π4

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