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If p, q, r are prime numbers such that p...

If p, q, r are prime numbers such that `p^(2)-q^(2)=r` then which of the following options are correct ?

A

`(cot2theta-cot7theta)/(sin theta)`

B

`(tan2theta-tan7theta)/(sin2theta)`

C

a positive number

D

a negative number

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The correct Answer is:
A, C, D
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