KCET · Maths · Inverse Trigonometric Functions
\( \cos \left[2 \sin ^{-1} \frac{3}{4}+\cos ^{-1} \frac{3}{4}\right] \)
- A \( \frac{3}{4} \)
- B does not exist
- C \( -\frac{3}{4} \)
- D \( \frac{3}{5} \)
Answer & Solution
Correct Answer
(C) \( -\frac{3}{4} \)
Step-by-step Solution
Detailed explanation
\( \cos \left[\sin ^{-1} \frac{3}{4} + \left(\sin ^{-1} \frac{3}{4} + \cos ^{-1} \frac{3}{4}\right)\right] \) \( \cos \left[\sin ^{-1} \frac{3}{4} + \frac{\pi}{2}\right] \)
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