Posted by Eliza on .
In right triangle ABC, angle A=3, angle B=60, and angle C=90. Find AB with AC is 12 ?

geometry 
Jennifer,
Let r=AB. Since we were given AC=12 and angle B=60, we can use:
sin 60 = 12/r
Solving for r we have:
r = 12/sin 60 = 13.86