Question

If \(\theta=\frac{11\pi}{7}\), then \[ \frac{1+\cos 8\theta}{\cot^{2}4\theta} + \frac{1-\cos 8\theta}{\tan^{2}4\theta} = \]

• A. \(\sin\frac{\pi}{7}\)
• B. \(\cos\frac{2\pi}{7}\)
• C. \(2\)
• D. \(0\)

Hint:

Convert all expressions into \(\sin\) and \(\cos\) before substituting numerical values of angles.

Answer 1

The Correct Option is C