AP EAMCET · Maths · Trigonometric Ratios & Identities
\(\cot 18^{\circ} \cdot \cot 36^{\circ}+1=\)
- A \(\sqrt{5+2 \sqrt{5}}\)
- B \(\sqrt{5-2 \sqrt{5}}\)
- C \(3-\sqrt{5}\)
- D \(3+\sqrt{5}\)
Answer & Solution
Correct Answer
(D) \(3+\sqrt{5}\)
Step-by-step Solution
Detailed explanation
Since, \(\cot 18^{\circ} \cot 36^{\circ}+1\)…
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