AP EAMCET · Maths · Trigonometric Ratios & Identities
\(\cos \frac{\pi}{12}=\)
- A \(\frac{\sqrt{2}-\sqrt{3}}{2}\)
- B \(\frac{\sqrt{2}+\sqrt{3}}{2}\)
- C \(\frac{\sqrt{2}-\sqrt{6}}{4}\)
- D \(\frac{\sqrt{2}+\sqrt{6}}{4}\)
Answer & Solution
Correct Answer
(D) \(\frac{\sqrt{2}+\sqrt{6}}{4}\)
Step-by-step Solution
Detailed explanation
Let \(\theta=\frac{\pi}{12}\) \(\because \cos 2 \theta=2 \cos ^2 \theta-1\)…
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