CAPE Pure Mathematics Unit 2 · May/June 2015 · Paper 1 · Question Q14
\int \frac{dx}{\sqrt{1 - 9x^2}} =
- (A)
\frac{1}{9}\sin^{-1} x + c - (B)
\frac{1}{3}\sin^{-1} 3x + c - (C)
\frac{1}{9}\sin^{-1}\frac{x}{3} + c - (D)
\frac{1}{9}\sin^{-1} 3x + c
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