If `f(x)=(x^(9)-3x^(5)+7x^(3)-x+1)/(cos^(2)x)` ,then `int_(-pi/4)^( pi/4)f(x)dx=`

int_(pi//4)^(3pi//4)(dx)/(1+cos x)=

let g(x)=ln x and f(x)=((1-x cos x)/(1+x cos x)) then int_(-(pi)/(4))^((pi)/(4))g(f(x))dx is equal to (A)ln1(B)ln2(C)ln e(D)ln4

int_((pi)/(4))^(3(pi)/(4))cos x*f(sin x)dx=

If f(x)=(1)/(3)cot^(3)x-cot x+int(cot^(4)x)dx and f((pi)/(2))=(pi)/(2) then f(x)=

If f(x)=sin x+cos x and g(x)={(|x|)/(x)x!=0,2,x=0 then the value of int_(-(pi)/(4))^(2 pi)gof(x)dx is equal to

If I_(1)=int_(3pi)^(0) f(cos^(2)x)dx and I_(2)=int_(pi)^(0) f(cos^(2)x) then

If f(x)+f(pi-x)=1 and g(x)+g(pi-x)=1 , then : int_(0)^(pi)[f(x)+g(x)]dx=

If P = int_(0)^(3pi) f(cos^(2)x)dx and Q=int_(0)^(pi) f(cos^(2)x)dx , then