Calculus 1 question I need help with?

nπ/2

Step-by-step explanation:

y = ln(tan(x)²)

ln(x) is undefined when x ≤ 0 or undefined.  Since tan(x)² is squared, it's never negative.  So we need to find where it's 0 or undefined.

tan(x) is 0 at x = πn.

tan(x) is undefined at x = π/2 + πn.

So tan(x) is 0 or undefined at x = nπ/2.

answer: the answer is ann