Find the cosine ratio of angle ? . hint: use the slash symbol ( / ) to represent the fraction bar, and enter the fraction with no spaces. triangle abc is shown. ab measures 12. bc measures 13. ca measures 5. the angle formed at point c is marked theta and angle a is the right angle.

We are given that the angle a is the right angle. So let us work from this.

ab = 12 (the vertical side of the triangle)

bc = 13 (which if drawn can be clearly observed to be the hypotenuse) = the side opposite to angle a

ca = 5 (the horizontal side of the triangle)

Since we are to find for the cosine ratio of angle c or angle θ, therefore:

cos θ = adjacent side / hypotenuse

cos θ = ca / bc

cos θ = 5 / 13

Check out the attached image below for the illustration of the triangle.

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step-by-step explanation: