Askor claimed: I believed trigonometric substitution only perform if there is obtainable a sq. root for example ##sqrt x^2 + two ##. No. Trig substitution is useful When you have the sum or change of squared terms - they don't need to be within a square root. Customization: Comprehending that https://gabletoppak.com/from-plastic-bottles-to-gabletop-cartons-a-step-toward-solving-the-plastic-pollution-crisis/