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Home > CCA2 > Chapter 12 > Lesson 12.2.2 > Problem 12-111

12-111.
  1. Without using a calculator icon Without using a calculator, solve each equation below in the domain 0 ≤ x < 2π. Homework Help ✎

    1. sin (x) = −1

    2. 2 cos (x) − 1 = 0

    3. tan (x) = 1

    4. 2 sin (x) = 4 sin (x) + 1

Reference the unit circle to help solve this problem.
For which angle(s) in the circle does sin(x) = −1.

Solve the equation for cos(x).

For which angle(s) in the unit circle does cos(x) = 1/2?

Refer to part (a).

How would you solve 2m = 4m + 1?
In this case m = sin(x).