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" 40."int(pi/4)^(3 pi/4)(dx)/((1+cos x))...

" 40."int_(pi/4)^(3 pi/4)(dx)/((1+cos x))=2

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

int_(pi//4)^(pi//2)(dx)/((1-cos2x))

int_(-pi/4)^(pi/4)(dx)/(1+cos2x) is

The Integral int_((pi)/(4))^((3 pi)/(4))(dx)/(1+cos x) is equal to:

int_(0)^(pi//4)(dx)/((1+cos2x))

int_(0)^(pi//4)(dx)/((1+cos2x))

Prove that : int_(pi//4)^(3pi//4) (1)/(1+cos x) dx = 2

int_(pi//4)^(3pi//4) (dx)/(1 + cos x) is equal to :

The value of int_(pi/4)^((3pi)/4)(cos x)/(1-cos x)dx is equal to (k-(pi)/(2)) then k=