If sinx = 1//2 and sin y=2//3, then what...

If `sinx = 1//2` and `sin y=2//3`, then what is the value of `[(6cos^2 x - 4cos^4 x)//(18cos^2 y -27cos^4 y)]` ?
यदि `sinx = 1//2` तथा `sin y=2//3` है, तो `[(6cos^2 x - 4cos^4 x)//(18cos^2 y -27cos^4 y)]` का मान क्या है?

A

`27//20`

B

`15//14`

C

`25//21`

D

`17//14`

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The correct Answer is:

B

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