### Home > CALC > Chapter 9 > Lesson 9.2.1 > Problem9-54

9-54.

No calculator! Find all point(s) of intersection for $y = 3\operatorname{cos} x$ and $y = 2 \operatorname{cos}^2 x + 1$ on the interval $0 ≤ x ≤ 2π$.

Solve the equations in Step 4. Note that these solutions only give the $x$-values. The problem asks for the "points", so you need to calculate the corresponding $y$-values.