The number of solution the equation `cos(theta).cos(pitheta)=1` has 0 (b) 2 (c) 4 (d) 2

The number of solutions the equation cos (theta). cos (pi theta)= 1 has

The number of solution the equation cos(theta).cos(pitheta)=1 has 0 (b) 1 (c) 4 (d) 2

The number of solution the equation cos(theta)*cos(pi theta)=1 has 0(b)2(c)4(d)2

The number of solutions of equation 3cos2 theta+5cos theta=1 in [0,2 pi] is

The number of solution(s) of the equation cos2theta=(sqrt(2)+1)(costheta-1/(sqrt(2))) , in the interval (-pi/4,(3pi)/4), is 4 (b) 1 (c) 2 (d) 3

The number of solution(s) of the equation cos2theta=(sqrt(2)+1)(costheta-1/(sqrt(2))) , in the interval (-pi/4,(3pi)/4), is 4 (b) 1 (c) 2 (d) 3

The number of solutions of equation 6cos2theta+2cos^2(theta/2)+2sin^2theta=0, -πltθltπ is 3 (b) 4 (c) 5 (d) 6

The number of solution of the equation sin theta cos theta cos 2 theta .cos 4theta =1/2 in the interval [0,pi]

The number of solution of the equation sin theta cos theta cos 2 theta .cos 4theta =1/2 in the interval [0,pi]

The number of solutions of equation 6cos2theta+2cos^2(pi/2)+2sin^2pi=0,-pi