Question 420880
By Euler's theorem, {{{cos(100) + i*sin(100) = e^(100i)}}}. The expression we are evaluating is {{{(3e^(100i))^3 = 27(e^(100i))^3 = 27e^(300i) = 27(cos(300) + i*sin(300))}}}. It can be further simplified if the angle is in degrees, by evaluating the cosine and sine of 300, but 300 could be either degrees or radians.