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

જો \(\frac{\pi}{2} \leq x \leq \frac{3 \pi}{4}\) હોય, તો \(\cos ^{-1}\left(\frac{12}{13} \cos x+\frac{5}{13} \sin x\right)\) = ___

  1. A \(x-\tan ^{-1} \frac{4}{3}\)
  2. B \(x+\tan ^{-1} \frac{4}{5}\)
  3. C \(x-\tan ^{-1} \frac{5}{12}\)
  4. D \(x+\tan ^{-1} \frac{5}{12}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(x-\tan ^{-1} \frac{5}{12}\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \frac{12}{13} \cos x+\frac{5}{13} \sin x \\ & \text { Let } \tan \alpha=\frac{5}{12}, \alpha \in\left(0, \frac{\pi}{2}\right) \\ & \Rightarrow \sin \alpha=\frac{5}{13}, \cos \alpha=\frac{12}{13}\end{aligned}\)…
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