SOLUTION: For which value is f (x) undefined: f(x)= cosx/1-cos2x

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Question 256805: For which value is f (x) undefined: f(x)= cosx/1-cos2x
Found 3 solutions by Fombitz, stanbon, jsmallt9:
Answer by Fombitz(32388)   (Show Source):
You can put this solution on YOUR website!
f(x) is undefined when the denominator equals zero.

or
or

Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website!
For which value is f (x) undefined: f(x)= cosx/1-cos2x
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Undefined when the denominator is zero.
Solve 1-cos(2x) = 0
cos(2x) = 1
2x = 0 or pi
x = 0 or pi/2
===================
Cheers,
Stan H.

Answer by jsmallt9(3758)   (Show Source):
You can put this solution on YOUR website!
(NOTE: A different solution from another tutor starts off correctly but it has an error.)

As stated in the other solution, we do want to find where
1 - cos(2x) = 0
or
1 = cos(2x)

The error comes next. The cos function is 1 for 0 radians, not . So:
where n is any integer.
For x, we divide both sides by 2:
where n is any integer.
which simplifies to:
where n is any integer.