यदि a cot theta +b "cosec" theta = p तथ...

यदि `a cot theta +b "cosec" theta = p` तथा `b cot theta +a "cosece" theta =q` हो, तो `p^2 -q^2` का मान है:

A

`a^2 -b^2`

B

1

C

`-1`

D

इनमें से कोई नहीं।

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The correct Answer is:

B

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