`(cos theta+sin theta)^(2)+(cos theta-sin theta)^(2)=2`

int cos2 theta * ln ((cos theta + sin theta) / (cos theta-sin theta)) d theta

(sin theta-cos theta)^(2)*(sin theta+cos theta)^(2)=

cos theta+sin theta=cos2 theta+sin2 theta

(cos theta-sin theta) / (cos theta + sin theta) = sec2 theta-tan2 theta

If 2 cot theta =3 , then what is (2 cos theta -sin theta)/(2 cos theta + sin theta) equal to ?

Prove each of the following identities : (cos theta) /((1- tan theta)) - (sin^(2) theta)/((cos theta - sin theta)) = (cos theta + sin theta)

If cos theta+sin theta=sqrt(2), then cos theta-sin theta=

Prove that (cos theta-sin theta)/(cos theta+sin theta)=sec2theta-tan2theta

Prove that :(cos theta-sin theta)/(cos theta+sin theta)=sec2 theta-tan2 theta