What is the value of `(1-cos^2theta)cos e c^2theta` ?

Given tan theta=(1)/(sqrt(5)) what is the value of (cos c^(2)theta-sec^(2)theta)/(cos ec^(2)theta+sec^(2)theta)

What is the value of ( 1 - 2 sin ^(2) theta cos^(2) theta )/( sin ^(4) theta + cos^(4) theta ) + 4 equal to

If sin^(8)theta+cos^(8)theta-1=0 then what is the value of cos^(2)theta sin^(2)theta

What is the value of [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta ? [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta का मान क्या है?

If theta=(pi)/(8) , then what is the value of (2cos theta+1)^(10)(2cos2theta-1)^(10)(2cos theta-1)^(10)(2cos4 theta-1)^(10) ?

Given that tantheta=1/(sqrt(3,)) the value of (cos e c^2theta-sec^2theta)/(cos e c^2theta+sec^2theta) is -1 (b) 1 (c) 1/2 (d) -1/2

If sin theta + sin^(2) theta =1 , then what is the value of ( cos^(12) theta + 3 cos^(10) theta + 3 cos^(8) theta + cos^(6) theta - 1) ?

If pi/2