Cos I can

Calculus Level 4

If

∑n=1∞cos⁡nn\sum_{n=1}^{\infty} \frac{\cos n}{n}

can be expressed in the form −12ln⁡(a−bcos⁡c)-\frac 12 \ln(a-b\cos c), where a,b,a,b, and cc are positive integers, find a+b+ca+b+c.

Jake Lai by Jake Lai
×

Problem Loading...

Note Loading...

Set Loading...