Inverse Sine, Cosine, & Tangent

5. Inverse Trigonometric Functions and Basic Trigonometric Equations / Inverse Sine, Cosine, & Tangent / 문제 2

문제 2

For the following trigonometric expression, evaluate and give the answer as an exact value in radians.
cot^{- 1}(- 1)

5π/4

π/4

7π/4

3π/4

For the following trigonometric expression, evaluate and give the answer as an exact value in radians.cot- 1(- 1)