2(cos^(2)theta-sin^(2)theta)=1

Evaluate 2(cos^2theta-sin^2theta)=1

If 2cos^(2)theta-2sin^(2)theta=1, then theta is equal to

If 2cos^(2)theta-2sin^(2)theta=1, then theta equals to

Show that (cos^(2)theta - sin^(2)theta)=(2tan theta)/((1- tan^(2)theta)) is not an identity .

If cos^(4)theta-sin^(4)theta=(2)/(13) , find cos^(2)theta-sin^(2)theta+1 .

Fill in the blanks : if cos^(2)theta - sin^(2)theta =(1)/(2) . then the value of cos^(4)theta-sin^(4) theta is _________________ .

Solve int((sin theta+sqrt(cos^(2)theta+2sin^(2)theta))^(n))/(sqrt(1+sin^(2)theta))cos theta d theta , where n ne -1 .

If theta lies in the first quadrant and cos^(2)theta - sin^(2) theta = (1)/(2) , then the value of tan^(2) 2 theta + sin^(2) 3 theta is :

Prove the following identity: ((1)/(sec^(2)theta-cos^(2)theta)+(1)/(cos ec^(2)theta-sin^(2)theta))sin^(2)theta cos^(2)theta=(1-sin^(2)theta cos^(2)theta)/(2+sin^(2)cos^(2)theta)