英语词汇“trigonometric substitutions”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	trigonometric substitutions
释义	trigonometric substitutions trigonometric substitutions [¦trig·ə·nə¦me·trik ‚səb·stə′tü·shənz] (mathematics) The substitutions x = a sin u, x = a tan u, and x = a sec u, which are used to rationalize expressions of the form √(a ²-x ²), √(x ²+ a ²), and √(x ²-a ²), respectively, when they appear in integrals.
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