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Home > PC > Chapter 6 > Lesson 6.2.3 > Problem 6-99

6-99.

Solve the equation 4 cos2 x = 3 for −∞ < x < ∞. Homework Help ✎

1. Solve for the cos x.
2. Use a unit circle to find solutions and their signs.
3. Add 2πn to each of the solutions above.