How do you solve the following equation # 2 cos x - 1=0# in the interval [0, 2pi]?
1 Answer
Jul 31, 2016
The solutions are
Explanation:
Get rid of -1 from left side
Use the unit circle Finds the value of x, where cos(x)=1/2.
It is clear that for #x=pi/3 and x=5pi/3. cos (x)=1/2.
so the solutions are