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If (sin^(4)alpha)/a +(cos^(4)alpha)/b = ...

If `(sin^(4)alpha)/a +(cos^(4)alpha)/b = 1/(a+b)`, show that `sin^(8)alpha/a^(3) +cos^(8)alpha/b^(3) =1/(a+b)^(3)`

A

`(1)/((a+b)^(3))`

B

`(a)/( b^(2))`

C

`(a)/( b-a)`

D

`(b)/(b-a)`

Text Solution

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The correct Answer is:
A
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