Question

In the right triangle shown, m A = 30° and AB = 12V3.
х
B
30
123
A
How long is AC?

Answer 1

Answer:

∴$Cos A=\frac{AC}{AB}$

➛ $Cos30=\frac{x}{12\sqrt{3} }$

➛ $\frac{\sqrt{3} }{2} =\frac{x}{12\sqrt{3} }$

➛$x=12\sqrt{3}*\frac{\sqrt{3} }{2}$

➛ $x=18$ ✓

➛$AC=18$ ✓

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