Question

What are the values of x when tan(x) is undefined?

A. -270°, -90°, 90°, and 270°

B. -270°, -90°, 0°, 90°, and 270°

C. -360°, -180°, 0°, 180°, and 360°

D. -360°, 0° and 360°

Answer 1

The values of tan x is undefined for odd number multiples of x.

Thus, the values of tan x is undefined for x = . . . -3(90), -1(90), 1(90), 3(90), . . .

Therefore, the values of x for which tan (x) is undefined are -270°, -90°, 90°, and 270° [option A].