Book: RS Aggarwal - Mathematics
Chapter: 3. Functions
Subject: - Class 11th
Q. No. 7 of Exercise 3B
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7
If 
then show that f(tanθ) = sin 2θ.
Given: 
Need to prove: f(tanθ) = sin 2θ
⇒ 
[as 1 + tan2 θ = sec2 θ]
⇒ 
[as 
and 
]
⇒ 
[Proved]
