Calculus Examples

$\ln (\cos (2 π))$

Step 1

Subtract full rotations of $2 π$ until the angle is greater than or equal to $0$ and less than $2 π$ .

$\ln (\cos (0))$

Step 2

The exact value of $\cos (0)$ is $1$ .

$\ln (1)$

Step 3

The natural logarithm of $1$ is $0$ .

$0$