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If (pi)/(2) lt theta lt pi, then possib...

If `(pi)/(2) lt theta lt pi`, then possible answers of `sqrt(2+sqrt(2+2cos4theta))` is/are :

A

`2cos theta`

B

`2sin theta`

C

`-2sin theta`

D

`-2 cos theta`

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The correct Answer is:
B, D
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VK JAISWAL ENGLISH-COMPOUND ANGLES-Exercise-2 : One or More than One Answer is/are Correct
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  20. If cot^(3)alpha+cot^(2)alpha+cot alpha=1 then which of the following...

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