Math Question: Given two triangles ABC and DEF, if angle A is congruent to angle D, angle B is congruent to angle E, and segment AB is congruent to segment DE, what can we conclude about triangles ABC and DEF?
+
What is the period of the trigonometric function f(x) = 3cos(4x) + 2sin(2x) - 5tan(x)?
+
What is the simplified form of (x^3 * x^7) / (x^2)^4?