1. Start by substituting another variable (like y) for 2x and solve like we have before, BUT you must include all answers in the specified domain
2. Then set each answer = to 2x
3. We only want answers in the specified domain (double check to make sure you have all possible solutions)
Example 1) Solve for all 𝛉 in degrees. Answers must be exact!
2cos 2
2
Example 2) Solve for 𝛉 in degrees for [0,360°). Answers must be exact!
tan2 1
Example 3) Solve for all x in radians. Answers must be exact!
3cos
2 2
x
Example 4) Solve for x in radians for [0, 2π). Answers must be exact!
1sin3 2
x
Example 5) Solve for θ in degrees for [0°,360°). Answers must be exact!
22sin 2 1
Example 6) Solve for x in radians for [0,2π). Answers must be exact!
2cos3 1 0x