Question

Find an angle α that is coterminal with an angle, in radians, measuring −13π/2, where 0≤α<2π. Give your answer as an exact answer involving π, if necessary.

Answer 1

α = 3π/2

Explanation:

To find the coterminal angle, add multiples of 2π until you have an angle in the desired range. Here, you need to add 8π.

α = -13π/2 + 8π = (-13 +16)π/2 = 3π/2