Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{sin18^{\circ}}{\cos\ 72^{\circ}}$$

Answer

sin(18*d)/cos(72*d)

Solution


Regroup terms.
\[\frac{eg\sin{18d}}{(\cos{72d})eg}\]
Regroup terms.
\[\frac{eg\sin{18d}}{eg\cos{72d}}\]
Cancel \(g\).
\[\frac{e\sin{18d}}{e\cos{72d}}\]
Cancel \(e\).
\[\frac{\sin{18d}}{\cos{72d}}\]
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