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The value of `(alpha^3)/2cos e c^2(1/2tan^(-1)alpha/beta)+(beta^3)/2sec^2(1/2tan^(-1)(beta/alpha))i se q u a lto` `(alpha+beta)(alpha^2+beta^2)` (b) `(alpha+beta)(alpha^2-beta^2)` `(alpha+beta)(alpha^2+beta^2)` (d) none of these

A

`(alpha-beta)(alpha^(2)-beta^(2))`

B

`(alpha+beta)(alpha^(2)-beta^(2))`

C

`(alpha+beta)(alpha^(2)+beta^(2))`

D

none of these

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The correct Answer is:
C
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