यदि x = a cos theta और y= b cot theta त...

यदि x = a cos `theta` और y= b cot `theta` तो `(ax^(-1) - by^(-1))(ax^(-1)+ by^(-1))` किसके बराबर है ?

A

0

B

1

C

`tan^(2) theta`

D

`sin^(2) theta`

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