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Editor
 Sep 18, 2022
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If $\sin 3\theta=\sin\theta$ the general value of $\theta$ is
Difficulty: Easy
A: 
$n\pi, (n+1)\frac{\pi}{4}$
B: 
$n\pi, (3n+1)\frac{\pi}{3}$
C: 
$(2n+1)\frac{\pi}{3}$
D: 
$n\pi, (2n+1)\frac{\pi}{4}$
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NETNUST Entry TestMathematicsSolution of Trigonometric Equations