"cot" theta = "sin" 2 theta, theta ne n ...

`"cot" theta = "sin" 2 theta, theta ne n pi, n in Z, "if" theta` equals

A

`45^@ and 60^@`

B

`45^@ and 90^@`

C

`45^@` only

D

`90^@` only

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The correct Answer is:

B

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