Answer:
Step-by-step explanation:
The cosine ratio of an angle is defined as the ratio of the adjacent side over the hypotenuse. Remember the ratios for sine, cosine, and tangent with the acronym SohCahToa :
Sine is Opposite/Hypotenuse: Soh
Cosine is Opposite/Hypotenuse
Tangent is Opposite/Adjacent
In the diagram:
Adjacent = 5
Opposite = 12, and
Hypotenuse = 13
Since Cosine = Opposite/Hypotenuse
Cosine of Θ would be 12/13 or 0.9231
See the attached image.
