Askor reported: I assumed trigonometric substitution only do the job if there is available a square root for example ##sqrt x^two + two ##. No. Trig substitution is helpful For those who have the sum or variation of squared conditions - they don't need to be inside a square root. https://gabletoppak.com/why-every-home-should-use-long-lasting-oil-storage-cartons-for-daily-cooking/
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