Question

Points of discontinuity. y = cot x, [0, 2 \[\pi \] ]

Answer 1

cotx = (cosx)/(sinx)
 Where is this function not defined?
i.e. where is sin(x)=0?
Because at this point, cotx will be undefined because you cannot divide by zero. So find all points from 0 to 2 pi where sinx is 0.