The number of solutions of `sum_(r=1)^5cosrx=5` in the interval `[0,2pi]` is 0 (b) 2 (c) 5 (d) 10

Number of solutions of sum_(r=1)^(5)cos rx=5 in the interval [0,4 pi] is

The number of solutions of sum_(r = 1)^(5)cosrx = 5 , in the interval [0, 2pi] is ___________.

The number of solutions of secxcos5x+1=0 in the interval [0,2pi] is

The number of solutions of the equation sin2x-2cosx+4sinx=4 in the interval [0,5pi] is

The number of solutions of the equation log_(sqrt2sin x)(1+cosx)=2 in the interval [0, 5pi] is

The number of solution of the equation Sigma_(r=1)^(5)cos(rx)=0 lying in (0, pi) is

The number of solutions of the equation tan x+sec x=2cos x lying in the interval [0,2 pi] is 0(b)1(c)2(d)3

The solution set of (5+4costheta)(2costheta+1)=0 in the interval [0,2pi] is

The solution set of (5+4cos theta)(2cos theta+1)=0 in the interval [0,2 pi] is