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Question: Answered & Verified by Expert
If $\sin \theta+\operatorname{cosec} \theta=2$, then the value of $\sin ^{10} \theta+\operatorname{cosec}^{10} \theta$ is equal to
MathematicsTrigonometric Ratios & IdentitiesAP EAMCETAP EAMCET 2021 (24 Aug Shift 2)
Options:
  • A $2$
  • B $2^{10}$
  • C $2^9$
  • D $2^8$
Solution:
1839 Upvotes Verified Answer
The correct answer is: $2$
Given, $\sin \theta+\operatorname{cosec} \theta=2$
It is possible only $\sin \theta=\operatorname{cosec} \theta=1$
$\therefore \sin ^{10} \theta+\operatorname{cosec}^{10} \theta=(1)^{10}+(1)^{10}=1+1=2$

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