Askor explained: I thought trigonometric substitution only function if there is on the market a sq. root including ##sqrt x^2 + two ##. No. Trig substitution is helpful For those who have the sum or big difference of squared terms - they needn't be within a sq. root. These thoroughly https://gabletoppak.com/gabletop-pak-leading-the-way-as-milk-carton-manufacturers-in-india/