Question

The value of $\tan \frac{\pi }{8}$ is equal to

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

Answer 1

Answer: (C)

$\tan \frac{\theta }{2}=\sqrt{\frac{1-\cos \theta }{1+\cos \theta }}$