Solve the following equation:`cos^2theta-sintheta costheta-1/2=0`

Solve the following equation: cos^(2)theta-sin theta cos theta-(1)/(2)=0

Solve the following equation: sin2 theta+cos theta=0

If 0^(@)lethetale90^(@) , then solve the following equations : (i) (costheta)/(1-sintheta)+(costheta)/(1+sintheta)=4 (ii) (cos^(2)theta-3costheta+2)/(sin^(2)theta)=1 (iii) (costheta)/("cosec"theta+1)+(costheta)/("cosec"theta-1)=2

Solve the following equation: sin3 theta+cos2 theta=0

Solve the following equation 5cos2 theta+2(cos^(2))(theta)/(2)+1=0,-(pi)/(2)

Eliminate theta from the following equations: x= a sintheta, y=b costheta and z=a sin^(2) theta+b cos^(2)theta .

Solve: costheta+sintheta=cost2theta+sin2theta

(sin3theta-cos3theta)/(sintheta+costheta)+1 =

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