Answer:
0.8
Step-by-step explanation:
The following data were obtained from the question:
Opposite = 3
Adjacent = 4
Hypothenus = 5
Cos R =?
Cosine R can be obtained by using the cosine ratio as illustrated below:
Cos R = Adjacent / Hypothenus
Cos R = 4/5
Cos R = 0.8
Thus, cosine R is equal to 0.8
