If `0 le x le 2pi`, then the number of real values of x, which satisfy the equation `cos x + cos 2x + cos 3x + cos 4x=0`, is

If 0<=x<2 pi, then the number of real values of x, which satisfy the equation cos x+cos2x+cos3x+cos4x=0

0<=x<2 pi0<=x<2 pi ,then the number of real values of x, which satisfy the equation quad cos x+cos2x+cos3x+cos4x=0 is :(1)3(2)5(3)7(4)9

For 0 le x le (pi)/(2) , the number of values of x satisfying the equation tan x+ sec x = cos x is

The number of values of x in [0, 5 pi] satisfying the equation 3"cos" 2x -10 "cos" x+7=0 , is

The number of values of x in the interval [0,3 pi] satisfying the equation cos^(2)x+2cos x-2=0 is

Find the set of values of x , which satisfy sin x * cos^(3) x gt cos x* sin^(3) x , 0 le x le 2pi .