If `int_(0)^(pi) x f (cos^(2) x + tan ^(4) x ) dx` `= k int_(0)^(pi//2) f(cos^(2) x + tan ^(4) x ) dx` then k =A. `pi/2`B. `pi/4`C. `pi`D. 1

If `int_(0)^(pi) x f (cos^(2) x + tan ^(4) x ) dx` `= k int_(0)^(pi//2

1.	If `int_(0)^(pi) x f (cos^(2) x + tan ^(4) x ) dx` `= k int_(0)^(pi//2) f(cos^(2) x + tan ^(4) x ) dx` then k =A. `pi/2`B. `pi/4`C. `pi`D. 1
Answer» Correct Answer - C

`int_(0)^((pi)/(4))(dx)/(acos^(2)x+bsin^(2)x)=`A. `(1)/(ab)tan^(-1)((b)/(a))" if "agt0,bgt0`B. `(1)/(ab)tan^(-1)((b)/(a))" if "alt0,blt0`C. `(pi)/(4)" if "a=1, b=1`D. none of these
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