Math question: How many obtuse triangles (having an angle greater than 90 degrees) are there out of all possible triangles with side lengths less than or equal to 20?
+
What is the value of sin(45°) + cos(60°) - tan(30°) + cot(150°)?
+
Math Question: What is the highest point of the parabola y = 2x^2 - 5x + 3 in terms of coordinates?