If tan(2 theta + 45^@) = cot 3 theta, w...

If `tan(2 theta + 45^@) = cot 3 theta`, where `(2 theta + 45^@)` and ` 3 theta` are acute angles, then the value of `theta` is

A

`5^@`

B

`9^@`

C

`12^@`

D

`15^@`

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