Question

In the triangle below, what ratio is cos R?
A. the ratio p over r
B. the ratio r over q
C. the ratio r over p
D. the ratio p over q

Answer 1

@shamin

Answer 2

@phi

Answer 3

do you know SOH CAH TOA ?

Answer 4

COS = ADJ / HYP

Answer 5

not really

Answer 6

adj = p
hyp = q

Answer 7

oh

Answer 8

so it must be D p over q

Answer 9

CAH as ivette has posted is short for COSINE = adjacent / hypotenuse

to use it, look for angle R.

next, find the hypotenuse. can you do that ? It's the side opposite the 90 angle
then find the adjacent side (the side of the triangle next to angle R that is *not* the hypotenuse)

then make the ratio adjacent/hypotenuse

Answer 10

i have no idea..

Answer 11

if you have time, this explains it
http://www.khanacademy.org/math/trigonometry/basic-trigonometry/basic_trig_ratios/v/basic-trigonometry

Answer 12

i have to get the answer now though D:

Answer 13

It's for today, my assignment

Answer 14

true, but if you can't do this problem then math will get harder and harder
break down, and try to learn it.

Answer 15

you will feel better

Answer 16

I'll do that, i have to anyways but i need to know the answer for today

Answer 17

@phi ?