Let ⇒⇒⇒⇒⇒Dividing numerator and denominator by cos4x.⇒Let tan2x = t ⇒ 2tanxsec2x dx = dtIf x=0,t=0If ⇒=⇒⇒

Q. 284.8( 5 Votes )

Evaluate:<span la

Answer :

Let

⇒

Dividing numerator and denominator by cos⁴x.

⇒

Let tan²x = t ⇒ 2tanxsec²x dx = dt

If x=0,t=0

⇒

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