Trigonometric Substitution

The animation visually walks through the trigonometric substitution method for evaluating the integral ∫ x²/(x²+16)^(3/2) dx, using a right triangle on the left to guide the transformation. On the right, the integral morphs step-by-step from the original expression to the final answer, ln|x + √(x²+16)| − x/√(x²+16) + C.