Math question: In triangle ABC, if the angle bisector of angle A intersects the side BC at point D, and the length of BD is 5 cm, what is the length of DC?
+
What is the length of the hypotenuse if one leg measures 5 units and the other leg measures 12 units?
+
Math Question: What is the derivative of sin(x) + e^x - ln(x) with respect to x?