The solution of the equation `cos^2theta+sintheta+1=0` lies in the interval

The solution of the equation cos^(2)theta+sintheta+1=0 lies in the interval

A solution of the equation cos^2theta+sintheta+1=0 lies in the interval a. (-pi//4,pi//4) b. (pi//4,3pi//4) c. (3pi//4,5pi//4) d. (5pi//4,7pi//4)

Solve the equation 2cos^2theta+3sintheta=0

Solve the equation 2cos^2theta+3sintheta=0

Solve the equation 2cos^2theta+3sintheta=0

One root of the equation "cos" theta-theta + (1)/(2) = 0 lies in the interval

One root of the equation "cos" theta-theta + (1)/(2) = 0 lies in the interval

The solution of the equation cos^2theta-2costheta=4sintheta-sin2theta where theta in [0,pi] is