In the triangle below, what ratio is cos?

A.) 12/13
B.) 5/13
C.) 13/5
D.) 12/5

I'll upload the picture in a minute, but what I'm getting is Cosθ= 1.5/3.9 but that's not a choice? Would you guys just take out the decimal point, since the answers correspond with the numbers if there weren't decimal points? If I do that, I get B, but I don't want to be wrong.

Question

In the triangle below, what ratio is cos?

A.) 12/13
B.) 5/13
C.) 13/5
D.) 12/5

I'll upload the picture in a minute, but what I'm getting is Cosθ= 1.5/3.9 but that's not a choice? Would you guys just take out the decimal point, since the answers correspond with the numbers if there weren't decimal points? If I do that, I get B, but I don't want to be wrong.

anonymous · Answer

attachment

freckles · Answer

that is right but you can play with that ugly fraction a bit

freckles · Answer

try multiplying top and bottom by 10 to get rid of the ugly decimals

freckles · Answer

after that you should be able to see that 15/39 can be reduced

anonymous · Answer

That's what I got, I was just confuse why they would put the decimal points at all. I just wanted to make sure I wasn't going to answer completely wrong. Thanks!

anonymous · Answer

confused*

freckles · Answer

np 
they probably put the decimals there to play with your head

freckles · Answer

you know because decimals are fun! :)

freckles · Answer

especially when they are inside fractions :)