જો $\sinh ^{-1}(-\sqrt{3})+\cosh ^{-1}(2)=K$ હોય, તો $\cosh K=$

  • A
    $\log (2-\sqrt{3})$
  • B
    $\log (2+\sqrt{3})$
  • C
    $0$
  • D
    $1$

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$a>0$ માટે, જો $f(x)=ax+b$ એ $[-1,1]$ થી $[0,2]$ પરનું વ્યાપ્ત વિધેય હોય, તો $\cot \left[\tan ^{-1} \frac{1}{7}+\tan ^{-1} \frac{1}{8}+\tan ^{-1} \frac{1}{5}\right]=$

$\sin ^{-1} x+\sin ^{-1}(1-x)=\cos ^{-1} x$ ના ઉકેલોની સંખ્યા કેટલી છે?

જો $y = \tan ^{-1}\left(\frac{1}{1+x+x^{2}}\right) + \tan ^{-1}\left(\frac{1}{x^{2}+2x+3}\right) + \tan ^{-1}\left(\frac{1}{x^{2}+5x+7}\right) + \dots + n \text{ પદો}$,તો $y'(0)$ શોધો.

જો $x=\cos ^{-1}\left(\frac{1}{\sqrt{1+t^2}}\right)$ અને $y=\sin ^{-1}\left(\frac{t}{\sqrt{1+t^2}}\right)$ હોય,તો $\frac{dy}{dx}$ શોધો.

$\tan ^{-1} \sqrt{x(x+1)}+\sin ^{-1} \sqrt{x^2+x+1}=\frac{\pi}{2}$ ના વાસ્તવિક ઉકેલોની સંખ્યા કેટલી છે?

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