Askor explained: I thought trigonometric substitution only operate if there is available a sq. root for example ##sqrt x^2 + 2 ##. No. Trig substitution is helpful Should you have the sum or change of squared conditions - they need not be inside of a sq. root. In conclusion, the https://gabletoppak.com/best-alternatives-to-plastic-water-bottles-in-kerala-for-a-greener-future/