## Trigonometry 7th Edition

$(150 + 360k)^{\circ}$ where k is any integer(positive or negative).
There exist an infinite number of angles that may be coterminal with any given angle. We can find a coterminal angle by adding or subtracting $360^{\circ}$ any number of times to that angle. For any integer value of k (positive or negative), $(150 + 360k)^{\circ}$ will be coterminal with the given angle $150^{\circ}$.