Use the trigonometric substitution $x = \frac{7}{9}sin(t)$ to put the integral in terms of $t$: $\int \frac{1}{\sqrt{49 - 81x^2}}dx = \int$ $dt$ Antideriving results in the following expression in terms of $t$: $+C$ Putting this answer in terms of $x$ results in the following answer: $+C$
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This gives us ∫(1/√(49-81((7/9)(-sin(t)))^2)) * (7/9)(-cos(t)) dt = ∫(1/√(49-49sin^2(t))) * (7/9)(-cos(t)) dt Show more…
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