AM-2543

Addition formulae

A Math · Secondary 4 · Easy · Addition formulae

Without using a calculator, express

\sin 15^\circ

in surd form using the identity for

\sin(A-B)

.

$\dfrac{\sqrt6-\sqrt2}{4}$
$\dfrac{\sqrt6+\sqrt2}{4}$
$\dfrac{\sqrt3-1}{2}$
$\dfrac{\sqrt3}{4}$

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