Determine the convergence of ∑n=1∞ln(cosh(1/n)cos(1/n))\sum_{n=1}^{\infty} \ln\left( \frac{\cosh(1/n)}{\cos(1/n)} \right)∑n=1∞ln(cos(1/n)cosh(1/n)).
Converges by Comparison Test
Diverges because the sequence of terms does not approach 0
Converges by Ratio Test
Diverges to infinity