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Question: Answered & Verified by Expert
The period of the function $f(\theta)=\sin \frac{\theta}{3}+\cos \frac{\theta}{2}$ is
MathematicsTrigonometric Ratios & IdentitiesTS EAMCETTS EAMCET 2003
Options:
  • A $3 \pi$
  • B $6 \pi$
  • C $9 \pi$
  • D $12 \pi$
Solution:
1075 Upvotes Verified Answer
The correct answer is: $12 \pi$
We have, $f(\theta)=\sin \frac{\theta}{3}+\cos \frac{\theta}{2}$
LCM of 3 and 2 is 6
$\Rightarrow \quad \frac{\theta}{6}=2 \pi \Rightarrow \theta=12 \pi$
$\therefore$ Period is $12 \pi$

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