1.

The value of alpha^(3)/2cosec^(2)(1/2tan^(-1)""alpha/beta)+beta^(3)/2sec^(2)(1/2tan^(-1)(beta/alpha)) is equal to

Answer»

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

ANSWER :C


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