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If u=cot^(-1)sqrt(tanalpha)-tan^(-1)sqrt...

If `u=cot^(-1)sqrt(tanalpha)-tan^(-1)sqrt(tanalpha),t h e ntan(pi/4- u/2)` is equal to (a)`sqrt(tanalpha)` (b) `sqrt(cotalpha)` (c)`tanalpha` (d) cot `alpha`

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We know that,
`tan^(−1)α+cot^(−1)α=π/2`
​ `u=π/2​−2tan^(−1)(sqrt(tanα) ​)`
​ `2tan^(−1)(sqrt(tanα) ...
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