# Can you use Dirichlet Kernel again?

Calculus Level 4

The Cesàro sum of $$\displaystyle \sum_{n=0}^\infty \cos n$$ is equal to $$\dfrac12$$.

Is the Cesàro sum $$\displaystyle \sum_{n=0}^\infty \sin n$$ also equal to $$\dfrac12$$?

×