Question

Please help with trig....Over an interval [-2π, 2π] state the values for which the cosecant function is not defined.

Answer 1

cosecant = 1 / sin
sin 0 , pi , 2pi , -pi and -2pi are all equal to 0 (opposite / hypotenuse)
so cosec at these values = h/0 which is not defined
these are your required angles for which cosec x is undefined

Answer 2

I have the same intervals, but what values for which the tangent function are not defined?

Answer 3

these are at pi/2 , 3pi/2, -pi/2 and -3pi/2