Askor claimed: I believed trigonometric substitution only operate if there is offered a square root such as ##sqrt x^two + 2 ##. No. Trig substitution is useful When you've got the sum or variance of squared phrases - they don't need to be inside of a square root. Advert It https://gabletoppak.com/why-gabletop-cartons-outshine-pet-bottles-for-branding-opportunities/