Jeffrey K. answered 09/24/20
Together, we build an iron base in mathematics and physics
Mary, here's how I would tackle this.
tan(-5π/3) = tan(-5π/3 + 2π) . . . . . since the value of tan repeats every kπ radians, for k = 0, ±1, ±2, . . .
= tan(π/3)
= √3