Math question: What is the integral of ∫(cos(x))^2 dx?
+
Math question: In triangle ABC, if angle A is congruent to angle B and side AC is congruent to side BC, what is the relationship between angles B and C?
+
What is the maximum value of the function f(x) = 2x^3 - 9x^2 + 12x + 4 on the interval [0, 5]?