CAPE Pure Mathematics Unit 1 · May/June 2012 · Paper 1 · Question Q25

Given that \alpha is an acute angle and \tan\alpha = \frac{3}{4}, then \sin(90^\circ - \alpha) =

1. (A)\frac{2}{5}
2. (B)\frac{3}{5}
3. (C)\frac{3}{4}
4. (D)\frac{4}{5}