જો $a_1, a_2, a_3, \dots, a_n$ સમાંતર શ્રેણીમાં હોય અને સામાન્ય તફાવત $d$ હોય, તો $\tan [\tan^{-1} (\frac{d}{1 + a_1a_2}) + \tan^{-1} (\frac{d}{1 + a_2a_3}) + \dots + \tan^{-1} (\frac{d}{1 + a_{n-1}a_n})] = $

  • A
    $\frac{a_1 - a_n}{1 + a_1a_n}$
  • B
    $\frac{a_n - a_1}{1 - a_1a_n}$
  • C
    $\frac{a_n - a_1}{1 + a_1a_n}$
  • D
    $\frac{a_1 + a_n}{1 + a_1a_n}$

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જો $\sin \left( \sin^{-1} \frac{1}{5} + \cos^{-1} x \right) = 1$ હોય,તો $x$ ની કિંમત શોધો.

જો $y = \sin^{-1}(x\sqrt{1 - x} + \sqrt{x}\sqrt{1 - x^2})$ હોય,તો $\frac{dy}{dx} = $

ધારો કે $S = \{x \in R : 0 < x < 1 \text{ અને } 2 \tan^{-1}\left(\frac{1-x}{1+x}\right) = \cos^{-1}\left(\frac{1-x^2}{1+x^2}\right)\}$. જો $n(S)$ એ $S$ માં રહેલા ઘટકોની સંખ્યા દર્શાવતું હોય,તો:

જો $\tan ^{-1}\left(\frac{x}{2}\right)+\tan ^{-1}\left(\frac{y}{2}\right)+\tan ^{-1}\left(\frac{z}{2}\right)=\frac{\pi}{2}$ હોય,તો $x y+y z+z x=$

$\cot^{-1} \frac{3}{4} + \sin^{-1} \frac{5}{13} = $

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