જો $\frac{a}{b} \tan x > -1$ હોય,તો $\tan ^{-1}\left[\frac{a \cos x-b \sin x}{b \cos x+a \sin x}\right]$ નું સાદું રૂપ આપો.

  • A
    $\tan ^{-1} \frac{b}{a}+x$
  • B
    $\tan ^{-1} \frac{b}{a}-x$
  • C
    $\tan ^{-1} \frac{a}{b}-x$
  • D
    $\tan ^{-1} \frac{a}{b}+x$

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$\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2(2)}-1}{\tan (2)}\right)-\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2\left(\frac{1}{2}\right)}+1}{\tan \left(\frac{1}{2}\right)}\right)$ ની કિંમત શોધો.

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