### Home > PC > Chapter 12 > Lesson 12.2.1 > Problem 12-40

12-40.

Find the matrix associated with rotating counterclockwise through the given angle measure. Homework Help ✎

90°

150°

Think about the points (1, 0) and (0, 1). If you rotated them through the given angle, where would they end up?

(1, 0) → (0, 1)

(0, 1) → (−1, 0)