Question

Find cos R.
A. cos R =29/21
B. cos R =21/20
C. cos R =21/29
D. cos R =20/29

Answer 1

The answer is 12 %R

Explanation:

Answer 2

`\text{C. }\cos R=21/29`

Explanation:

In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse.

From the diagram, we know:

• Angle R's adjacent side is 21
• The hypotenuse (longest side) of the right triangle is 29

Therefore, the cosine of angle R must be
`\boxed{(21)/(29)}`