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If 2sec^2 alpha- sec^4 alpha-2 cosec^2 a...

If `2sec^2 alpha- sec^4 alpha-2 cosec^2 alpha+cosec^4 alpha=15/4` then `tan alpha=`

A

`1//sqrt(2)`

B

`1//2`

C

`1//2sqrt(2)`

D

`1//4`

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The correct Answer is:
A
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MOTION-TRIGNOMETRIC RATIOS & IDENTITIES -Exercise 2(Level -I)
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