Consider the non-right triangle below. 19610800111.jpg Suppose that m\angle BCA=70^{\circ}, and that

meplasemamiuk 2021-11-22 Answered
Consider the non-right triangle below.

Suppose that mBCA=70, and that x=33cm and y=47cm What is the degree measure of ABC?
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Expert Answer

Glenn Cooper
Answered 2021-11-23 Author has 12 answers
Step 1
Using the cosine law,
AB=AC2+BC2(2ACBCcosBCA)
AB=472+332(24733cos70)
AB=2237.05
AB=47.29
Step 2
Using the cosine law,
ABC=cos1(BC2+AB2AC22×BC×AB)
ABC=cos1(0.3576)
ABC=69.04
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