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12-77.
  1. Solve for x. Homework Help ✎

    1. 2sin(x) = 1

    2. cos2(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.