The value of cos ^{-1} left[ cot left{ sin ^{ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Let the expression be $E = \cos ^{-1} \left[ \cot \left\{ \sin ^{-1} \sqrt{\frac{2-\sqrt{3}}{4}} + \cos ^{-1} \frac{\sqrt{12}}{4} + \sec ^{-1} \sq

Vedclass · Accepted Answer

$\frac{\pi}{2}$

Vedclass · Answer

(D) Let the expression be $E = \cos ^{-1} \left[ \cot \left\{ \sin ^{-1} \sqrt{\frac{2-\sqrt{3}}{4}} + \cos ^{-1} \frac{\sqrt{12}}{4} + \sec ^{-1} \sqrt{2} \right\} \right]$.First,simplify the terms inside the bracket:$1$. $\sin ^{-1} \sqrt{\frac{2-\sqrt{3}}{4}} = \sin ^{-1} \sqrt{\frac{4-2\sqrt{3}}{8}} = \sin ^{-1} \sqrt{\frac{(\sqrt{3}-1)^2}{8}} = \sin ^{-1} \left( \frac{\sqrt{3}-1}{2\sqrt{2}} \right) = \frac{\pi}{12} = 15^{\circ}$.$2$. $\cos ^{-1} \frac{\sqrt{12}}{4} = \cos ^{-1} \frac{2\sqrt{3}}{4} = \cos ^{-1} \frac{\sqrt{3}}{2} = \frac{\pi}{6} = 30^{\circ}$.$3$. $\sec ^{-1} \sqrt{2} = \cos ^{-1} \frac{1}{\sqrt{2}} = \frac{\pi}{4} = 45^{\circ}$.Summing these angles: $\frac{\pi}{12} + \frac{\pi}{6} + \frac{\pi}{4} = \frac{\pi + 2\pi + 3\pi}{12} = \frac{6\pi}{12} = \frac{\pi}{2}$.Now,substitute back into the expression:$E = \cos ^{-1} \left( \cot \frac{\pi}{2} \right) = \cos ^{-1} (0) = \frac{\pi}{2}$.

The value of $\cos ^{-1} \left[ \cot \left\{ \sin ^{-1} \sqrt{\frac{2-\sqrt{3}}{4}} + \cos ^{-1} \frac{\sqrt{12}}{4} + \sec ^{-1} \sqrt{2} \right\} \right]$ is

Similar Questions

The magnitude of the projection of the vector $\vec{a} = 4\hat{i} - 3\hat{j} + 2\hat{k}$ on the line which makes equal angles with the coordinate axes is

Which of the following is not used as a biopesticide?

Two closed organ pipes of length $100\,cm$ and $101\,cm$ long give $16$ beats in $20\,sec$ when each pipe is sounded in fundamental mode. Calculate the velocity of sound in $m/s$.

What type of glycosidic linkages are present in cellulose?

In which of the following reactions is hydrogen gas not liberated?

Vedclass Test Series

Exam Paper Generator

Online Exam Module