Solve the trigonometric equation : `3 cos^2 theta + 7 sin^2 theta =4`

Solve the trigonometric equation : sin2 theta=(1)/(2)

Solve the trigonometric equation: cos5 theta=-(1)/(2)

Solve the trigonometric equation: cos theta-sin theta=-1

Solve the following trigonometric equations, (ii) cos 3theta+costheta-2cos theta=0 (iii) cos 3theta+8cos^(3)theta=0

Solve 7 cos^(2) theta+3 sin^(2) theta=4 .

Solve the following trigonometric equations,(i) sin mtheta+"sin" theta=0 (ii) cos m theta-cos ntheta=0 (iii) "sin" 2theta+costheta=0 (iv) "sin"3theta+cos2theta=0

Solve the following trigonometric equation: sin^(3)3 theta=0

Solve cos^(2)theta+sin theta=1

Solve the following equation: cos4 theta=cos2 theta

Solve the following trigonometric equation: tan2 theta=sqrt(3)