If tantheta + cot theta = a then the val...

If `tantheta + cot theta = a` then the value of ` tan^4 theta + cot^4 theta =`

A

`a^4-4a^2-2`

B

`a^4-4a^2+2`

C

`a^4+4a^2-2`

D

`a^4+4a^2+2`

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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