reemalnuaimi29 reemalnuaimi29

20-05-2021
Mathematics

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Given triangle ABC with BC=16cm, AB=8cm, and AC=22cm. Use the Law of Cosines to find m∠A.

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GarfieldNedLaws GarfieldNedLaws

20-05-2021

Answer:

m∠A = 33.948° or 0.5925 radians

Step-by-step explanation:

cos(A) = (b^2 + c^2 − a^2) / 2bc

cos(A) = (22^2 + 8^2 − 16^2) / 2*22*8 = 0.8295454545 or 73/88

m∠A = arccos(73/88) = 33.94792653

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