H2 Math Question Bank Access Maclaurin Series & Power Series
2021 MI P2 Q1
Given that $\theta $ is a sufficiently small angle, show that
$\frac{1}{\sin 2\theta +\cos \theta }\approx 1+a\theta +b{{\theta }^{2}}$,
where $a$ and $b$ are constants to be determined.
[4]
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