Question

For which angle is secant undefined?
30°
45°
180°
270°

Answer 1

the answer is 180 degrees

Explanation:

i used my head and my google maths

Answer 2

180
The secant is undefined at angle values that represent 1/4 and 3/4 of a full circle. At these angles, the triangle geometrically vanishes into a simple line segment on the Y axis. The value of the triangle's adjacent side is zero and division by zero is undefined.