Much Better than Pythagoras Theorem | Al-Kashi's Law of Cosines

Law of Cosines | Pythagoras Theorem | Find the value of "X" | Area of triangle and Circle | Basic Calculus | Integration | Nice Exponential Equation | Find Square root of a Number | Math Olympiad | Harvard University Entrance Exam | Hard Geometry Exam Question | Only 1% of Students Got this Math Question Correct | Math Tricks | SAT Math Problems