Question

Cannot seem to figure this one out.

Answer 1

cosB = 2√6 / 7

Explanation:

use the pythagorean theorem to find the missing side

a² + b² = c²

a² + 5² = 7²

a² + 25 = 49

a² = 24

a = √24

a = 2√6

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cosB = adj/hyp

cosB = 2√6 / 7