What is the ratio of the area of a right-angled triangle to an equilateral triangle with equal perimeter, if the base of the right-angled triangle is twice the side length of the equilateral triangle?
+
What is the limit of (x^2 - 5x + 6) / (x - 2) as x approaches 2?
+
Question: What is the period of the cosine function f(x) = cos x?