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JEE Mains · Maths · STD 12 - 2. inverse trigonometric function

यदि \(\tan A=\frac{1}{\sqrt{x\left(x^2+x+1\right)}}, \tan B=\frac{\sqrt{x}}{\sqrt{x^2+x+1}}\) तथा \(\tan \mathrm{C}=\left(\mathrm{x}^{-3}+\mathrm{x}^{-2}+\mathrm{x}^{-1}\right)^{\frac{1}{2}}, 0<\mathrm{A}, \mathrm{B}, \mathrm{C}<\frac{\pi}{2}\) है, तो \(\mathrm{A}+\mathrm{B}\) = ...........

  1. A \(\mathrm{C}\)
  2. B \(\pi-C\)
  3. C \(2 \pi-C\)
  4. D \(\frac{\pi}{2}-C\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{C}\)

Step-by-step Solution

Detailed explanation

Finding \(\tan (A+B)\) we get \(\Rightarrow \tan (\mathrm{A}+\mathrm{B})=\) \(\frac{\tan A+\tan B}{1-\tan A \tan B}\) \(=\frac{\frac{1}{\sqrt{x\left(x^2+x+1\right)}}+\frac{\sqrt{x}}{\sqrt{x^2+x+1}}}{1-\frac{1}{x^2+x+1}}\)…
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