Math, asked by puttilaxmi58, 9 months ago

: If f(x) = 2x/1+x2. prove that f(tan 0) = sin 20.
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Answers

Answered by shivam247314

1

Answer:

f(tanθ)=2tanθ(1+tan2θ)2tanθsec2θ=2sincosθ×θ=2sinθ.

cosθ=sin20

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