Askor explained: I assumed trigonometric substitution only perform if there is available a square root for instance ##sqrt x^2 + 2 ##. No. Trig substitution is helpful When you've got the sum or variation of squared conditions - they don't need to be inside a square root. Obtainable in three https://gabletoppak.com/customized-packaged-drinking-water-with-your-brand-logo/