Askor reported: I believed trigonometric substitution only perform if there is accessible a square root such as ##sqrt x^two + 2 ##. No. Trig substitution is useful When you've got the sum or variance of squared terms - they needn't be inside a sq. root. The post traces the record https://gabletoppak.com/why-every-home-should-use-long-lasting-oil-storage-cartons-for-daily-cooking/