Answer:
Step-by-step explanation:
The cosine ratio is for the given angle. In this case, the angle is B. So you need the side adjacent the angle B (next to) that is NOT the hypotenuse. You also need the hypotenuse. S you would need :
You can remember the ratios by using SOH-CAH-TOA.
Sine=Opposite/hypotenuse
Cosine=adjacent/hypotenuse
Tangent=opposite/adjacent
109.5°
I made a 90% on the test. This is the correct answer.
4%
40=(500*r*2)/100
40=(500*r*2)/100*100/1 both sides
4000=1000r
r=4%