Question

The value of (tan 63${}^{\circ }$ - cot 63${}^{\circ })$ is equal to

• A. $\frac{2}{\sqrt{5}+1}\sqrt{10-2\sqrt{5}}$
• B. $\frac{2}{\sqrt{5}+1}\sqrt{10+2\sqrt{5}}$
• C. $\frac{\sqrt{5}-1}{4}\sqrt{10-2\sqrt{5}}$
• D. $\frac{\sqrt{5}-1}{\sqrt{5}+1}\sqrt{10+2\sqrt{5}}$

Answer 1

Answer: (D)

Correct answer is (d) $\frac{\sqrt{5}-1}{\sqrt{5}+1}\sqrt{10+2\sqrt{5}}$