For what value of `k` the equation `sinx+cos(k+x)+cos(k-x)=2` has real solutions?

For what values of k the equation sinx+cos(k+x)+cos(k-x)=2 has real solution?

For what value of k the equation sin x+cos(k+x)+cos(k-x)=2 has real solutions?

The value of k if the equation 2 cos x + cos 2kx=3 has only one solution is

For what values of k, the equation x^2+2(k-4) x + 2k=0 has equal roots?

If the equation sin x+cos(k+x)+cos(k-x)=2 has real solutions,then sin k can be(A)(1)/(4)(B)(1)/(sqrt(2))(C)(3)/(4)(D)-(3)/(4)

The equation k sinx + cos2x= 2k-7 has a solution if

The number of integral values of k for which the equation 7 cos x +5 sin x=2 k+1 has a solution, is

The number of integral values of k for which the equation 7 cos x + 5 sinx = 2k+1, has a solution is :

The number of integral values of k for which the equation 7 cos x + 5 sin x=2 k +1 has a solution is -