Question: Show that dx/a2 - x2 = sin-1 x/a + C, a > 0 By writing a2 - x2 = a2 [1-(x/a)2] and making the substitution

Show that
∫dx/√a2 - x2 = sin-1 x/a + C, a > 0
By writing a2 - x2 = a2 [1-(x/a)2] and making the substitution u = x/a

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