Question

The value of y when $x = \pi/8$ is

• A. 1
• B. 0
• C. $\sqrt{2}-1$
• D. not defined

Answer 1

Answer: (B)

0

Answer 2

The given expression simplifies to $\cot(4x)$ using sum of series formulas. Substituting $x=\pi/8$ yields $\cot(\pi/2)=0$.