based on the unit circle, list the value(s) that tan(x) is not defined in the interval 0 <= x 0= 2pie (0 greater than or equal to x greater or equal to 2 pie)

Answer 1

So tan(x) is defined as sin(x) / cos(x). In order for tan(x) to not be defined, this means cos(x) = 0, because you would get division by zero which is impossible. So now the question becomes, what values of x between 0 and 2pi would make cos(x) = 0? This is something you should be able to find on a unit circle chart if you have one.