Question

Check all that apply. Sec θ is undefined for θ = ____. A. π. B. π/2. C. 0. D. 3π/2.

Answer 1

Secant is a trigonometric function that is the reciprocal of the function cosine. This means that in a cartesian plane, the value of secant is equal to r / x. For the values to be undefined, x should be zero. The angles are π/2 and 3π/2. The answers are B and D.