Question

I need some help with the steps to solve this. I'll attach a drawing of the right triangle below. Thank you!!!

Let f=9, and d=13. Find angle E.

Answer 1

There we go, that is the triangle I've been given.

Answer 2

just apply a2=c2-b2

Answer 3

For side e I get e=9.38

Answer 4

But I'm looking for angle E

Answer 5

oh sorry apply cos(E)=9/13

Answer 6

So cos(E)=9/13... How would I do that...

Answer 7

cosine(theta)=9/13

Answer 8

use calculator and find cos inverse (9/13)

Answer 9

I got cos-1(9/13)=46.187

Answer 10

so thats E

Answer 11

just check whether it is in radian or degree

Answer 12

It's in degrees right now haha