Learn.
- Adjust domain
- Move all number to one side
- Find the inverse
- Find across adjusted domains
- Reduce the domain and answers back to domain given
Master.
Question 1. [3 mark]
Find the values of x in the domain [0, 2pi], 1 = (2) sin(2x) – 1
Solve this algebraicly.
Question 2. [2 marks]
Find the values of x in the domain [0, pi], y = (2/3) sin(2x) – 1, find the values of interception with the line y = -1/3.
Solve this graphically.
Question 3. [not an exam style question]
Find the values of x in the domain [-pi, pi], y = (3) cos((1/2)x), find the values of interception with the line y = 1/3.
Solve this graphically and check your answers algebraically.
Answers.
Question 1.
pi/4, 5 pi/4
Question 2.

Question 3.
Ignore this
Find the values of x in the domain [0, 2pi], 0 = (4/3) sin(2x) – 1
Solve this algebraically.
