Question

Find the measure of each indicated side. Round your answer to the nearest tenth.

Answer 1

Explanation:

By the law of cosines,
`(59.7)^2=52^2+41^2-2\cdot 52 \cdot 41 \cos(\angle R).`

Thus, after solving for
`\cos(\angle R)`, we get
`\cos(\angle R) = 0.1925211.` So taking the inverse cosine then yields
`\boxed{\angle R = 1.377 \text{ rad}}.`