" (vii) "cos4 theta=cos2 theta

Solve the following equation: cos4 theta=cos2 theta

4cos6 theta cos4 theta cos2 theta=

4 cos 6 theta cos 4 theta cos 2 theta =

Solve the following equation: cos4theta=cos2theta

( sin 4 theta - sin 2 theta )/(cos 4 theta + cos 2 theta )=

If : cos 6 theta + cos 4 theta + cos 2 theta + 1 = 0 , where, 0 lt theta lt 180^(@) , then : theta =

Solve : cos 6 theta + cos 4 theta + cos 2 theta + 1 = 0, 0^(@) lt theta lt 180^(@)

If tan^4 theta+ tan^2 theta=1 then the value of cos^4 theta+cos^2 theta is यदि tan^4 theta+ tan^2 theta=1 हो, तो cos^4 theta+cos^2 theta का मान क्या होगा?

Prove that: sin^4 theta - cos^4 theta= 1-2 cos^2 theta .