Q. 73.5( 4 Votes )
If
then show that f(tanθ) = sin 2θ.
Answer :
Given:
Need to prove: f(tanθ) = sin 2θ
⇒ [as 1 + tan2 θ = sec2 θ]
⇒ [as
and
]
⇒ [Proved]
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