Question

In the right trange show, A=30 degrees and AC=12
How long is AB

Answer 1

`AB=6√(3)`

Explanation:

`Given\ \angle A=30\textdegree\\\\AC=12\\\\\cos \theta=(adjacent)/(hypotenuse)\\\\\cos A=(AB)/(AC)\\\\\cos 30=(AB)/(12)\\\\(√(3))/(2)=(AB)/(12)\\\\AB=6√(3)`