isi-entrance 2018 Q22

isi-entrance · India · UGA Standard trigonometric equations Solve trigonometric equation for solutions in an interval

The number of solutions of the equation $\sin ( 7 x ) + \sin ( 3 x ) = 0$ with $0 \leq x \leq 2 \pi$ is
(A) 9
(B) 12
(C) 15
(D) 18.

The number of solutions of the equation $\sin ( 7 x ) + \sin ( 3 x ) = 0$ with $0 \leq x \leq 2 \pi$ is\\
(A) 9\\
(B) 12\\
(C) 15\\
(D) 18.