`int_(0)^(pi/2)sec^2xdx`

int_(0)^( pi/2)sec^(2)xdx

Find the error in steps to evaluate the following integral int_(0)^(pi)(dx)/(1+2 sin ^(2) x )=int _(0)^(pi)(sec^(2)xdx)/(sec^(2)x+2 tan^(2)x)=int_(0)^(pi) (sec^(2)xdx)/(1+3 tan^(2)x) =(1)/(sqrt3)[tan^(-1)(sqrt3 tan x)]_(0)^(pi)=0

int_(0)^( pi/4)sec^(2)xdx

int_(0)^(pi//6)sec^(2)xdx

" 2.Evaluate "int_(0)^( pi/4)sec^(2)xdx

int_(0)^( pi/2)sin xdx

int_(0)^( pi/2)sin xdx

int_(0)^( pi/2)sin xdx

int_0^(pi/2)sin^2xdx =

int_0^(pi/4) sec^4xdx