Question

At what which of the following sets of values is the tangent function undefined?(1 point)
Responses

at 45 and 135 degrees
at 45 and 135 degrees

at 90 and 270 degrees
at 90 and 270 degrees

at 90 and 180 degrees
at 90 and 180 degrees

at 60 and 120 degrees
at 60 and 120 degrees

Answer 1

Tangent is undefined where cosine = 0, i.e. at odd multiples of 90°. So it is undefined at 90° and 270°.