Question

Referring to the Fig. in Question #23, find the cosine of angle R.
Reduce the answer to the lowest terms.

Answer 1

@jim_thompson5910

Answer 2

same idea as last time, but now use

cos(angle) = adjacent/hypotenuse

Answer 3

SohCahToa Right? Have you heard that?

Answer 4

SOH, CAH, TOA is a handy way to remember the trig ratios
It's pronounced as "soak, a, toe-a" (that's how I remember it anyway)


For SOH
S = sine
O = opposite
H = hypotenuse
which means sine(angle) = opposite/hypotenuse


For CAH
C = cosine
A = adjacent
H = hypotenuse
which means cosine(angle) = adjacent/hypotenuse


For TOA
T = tangent
O = opposite
A = adjacent
which means tangent(angle) = opposite/adjacent

Answer 5

lol you read my mind that was about to be my next question :) thanks! okay so would CAH be 3/5?

Answer 6

yes 6/10 = 3/5

Answer 7

Okay yay :P thanks!!

Answer 8

you're welcome