A, B & C form the vertices of a triangle. ∠ CAB = 90°, ∠ ABC = 43° and AB = 9.3. Calculate the length of AC rounded to 3 SF. what is AC?

Japhiru
Mar 30, 2017

#2**+3 **

First, I suggest drawing a picture of what the problem says so you can see what I'm talking about.

I would upload one, but I can't right now on this computer.

tan = opposite / adjacent

Plug in the numbers you know.

tan 43º = AC / 9.3

Multiply both sides by 9.3 .

9.3tan43º = AC

Put this into a calculator to get that

AC ≈ 8.672

You had it right!!

hectictar
Mar 30, 2017