### Home > A2C > Chapter 13 > Lesson 13.1.4 > Problem13-72

13-72.

Solve $2 \operatorname{sin}\left(x\right) \operatorname{cos}\left(x\right) + \operatorname{cos}\left(x\right) = 0$. Give your answers in degrees or radians.

cos(x) is a common factor. Factor it out and use the Zero Product Property. Give all answers between 0° and 360° or 0 and 2π.