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If cosec 39^@=x, then the value of 1/( c...

If `cosec 39^@=x`, then the value of `1/( cosec^2 51^@)+sin^2 39^@+tan^2 51^@ -1/(sin^2 51^@ sec^2 39^@)` is:
यदि `cosec 39^@=x`, तो `1/( cosec^2 51^@)+ sin^2 39^@+tan^2 51^@ -1/(sin^2 51^@ + sec^2 39^@)` का मान ज्ञात करें:

A

`20 1/2`

B

21

C

`22 1/2`

D

22

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PINNACLE-TRIGONOMETRY-EXERCISE
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  9. The value of (2(sin^6 theta+cos^6 theta)-3(sin^4 theta+cos^4 theta))/ ...

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