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Can someone explain and steps on how to do this please

Can someone explain and steps on how to do this please-example-1

1 Answer

4 votes

Answer:

66.4°

Explanation:


\cos \: m\angle B = (2)/(5) \\ \cos \: m\angle B = 0.4 \\ m\angle H = { \cos}^( - 1) (0.4) \\ m\angle B = 66.421821522 \\ \huge \red{ \boxed{m\angle H = 66.4 \degree}}

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