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cot theta=sin 2 theta,(theta ne n pi), i...

`cot theta=sin 2 theta,(theta ne n pi),` if `theta`

A

`45^(circ)` or `90^(circ)`

B

`45^(circ)` or `60^(circ)`

C

`90^(circ)` only

D

`45^(circ)` only

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