SOLUTION: the number of solutions in (0,2pi) satisfying the equation cos(2x)=1 is

Question 985115: the number of solutions in (0,2pi) satisfying the equation cos(2x)=1 is
Answer by ikleyn(52880) (Show Source): You can put this solution on YOUR website!

If = , then = or = .

The first equation = implies that = .

The second equation = implies = = .

So, you have two potentially fitted solutions: and .

I don't know if you include the zero to your interval.

Usually, when the zero is included into the interval (, ), then it is denoted as [, ) and is called as semi-segment.

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