### Home > INT3 > Chapter 12 > Lesson 12.2.1 > Problem 12-77

12-77.

Solve for

*x*. Homework Help ✎2sin(

*x*) = 1cos

^{2}(*x*) + 4cos(*x*) + 4 = 0

Isolate sin(*x*).

sin(*x*) = ^{1}/_{2}

Use the unit circle to help you find the values that solve the equation.

Let *U* = cos (*x*) to begin.

No solution.