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12-91.
  1. Without using a calculator, solve each equation below in the domain 0 ≤ x < 2π. Homework Help ✎

    1. sin(x) = –1

    2. 2cos(x) – 1 = 0

    3. tan(x) = 1

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