### Home > CALC > Chapter 12 > Lesson 12.1.2 > Problem 12-27

12-27.

This is when *dy*/*dθ* = 0.

You will need to use a double angle identity to rewrite your *y* = equation or your final answer.

12-27.

This is when *dy*/*dθ* = 0.

You will need to use a double angle identity to rewrite your *y* = equation or your final answer.