The solution set of the equation `4s inthetadotcostheta-2costheta-2sqrt(3)s intheta+sqrt(3)=0` in the interval `(0,2pi)` is `{(3pi)/4,(7pi)/4}` (b) `{pi/3,(5pi)/3}` `{(3pi)/4,pi,pi/3(5pi)/3}` (d) `{pi/6,(5pi)/6,(11pi)/6}`

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

(pi)/(4)-(3 pi)/(4)-(pi)/(6)+(pi)/(4)=

(pi)/(4)+(pi)/(3)+(pi)/(6)

The solution o the equation cos^(2)theta+s int h eta+1=0 lies in the interval (-pi/4,pi/4) b.(pi/4,3 pi/4)c(3 pi/4,5 pi/4)d.(5 pi/4,7 pi/4)

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

(pi)/(4)+(2 pi)/(3)-(pi)/(6)

(pi)/(4)-pi/3-pi/6

The solutions of the equation sin x+2sin2x+sin3x=cos x+3cos2x+cos3x in the interval 0<=x<=2 pi, are (pi)/(8),(5 pi)/(8),(2 pi)/(3)(b)(pi)/(8),(5 pi)/(8),(9 pi)/(8),(13 pi)/(8)(1 pi)/(3),(9 pi)/(3),(2 pi)/(3),(13 pi)/(8) (d) (pi)/(8),(5 pi)/(8),(9 pi)/(3),(4 pi)/(3),(4 pi)/(3),(9 pi)/(3),(2 pi)/(3),(13 pi)/(8)(d)

sin((13pi)/3)sin((8pi)/3)+cos((2pi)/3)sin((5pi)/6)=1/2

If cos theta+sqrt(3)s int h eta=2, then theta=pi/3b2 pi/3c.4 pi/3d.5 pi/3