To solve the equation 2 cos(x) – 2 cos(x) sin(x) = 0, we can start by factoring:
Factor out 2 cos(x):
2 cos(x) (1 – sin(x)) = 0
This gives us two cases to consider:
- 2 cos(x) = 0
- 1 – sin(x) = 0
For the first case, 2 cos(x) = 0:
Dividing by 2, we have cos(x) = 0. The solutions for this equation in the interval [0, 2π] are:
- x = π/2
- x = 3π/2
For the second case, 1 – sin(x) = 0:
This simplifies to sin(x) = 1. The solution for this equation in the interval [0, 2π] is:
- x = π/2
Now, we combine the solutions from both cases. The results are:
- x = π/2 (from both cases)
- x = 3π/2 (from the first case only)
Thus, the complete set of solutions to the equation 2 cos(x) – 2 cos(x) sin(x) = 0 on the interval [0, 2π] is:
- x = π/2
- x = 3π/2