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Evaluate: (i) sin(tan^(-1)x+tan^(-1)(1/x...

Evaluate: (i) `sin(tan^(-1)x+tan^(-1)(1/x))` for `x >0`
(ii) `cot(tan^(-1)a+cot^(-1)a)`

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(i)Given as\
`sin (tan ^{-1} x+tan ^{-1} (1 / x))` for `x>0`

`implies sin (tan ^{-1} x+cot ^{-1} x)`

`(because tan ^{-1} theta=cot ^{-1} frac{1}{theta} text { for } x>0)`

...
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