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Mathematics
Norah
13 October, 00:04
In △ABC, c=28, m∠B=92°, and a=38. Find b.
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Xzavier Mckinney
13 October, 03:11
0
=48.0
Step-by-step explanation:
In this problem we can use the cosine formula to find b.
b²=a²+c²-2acCosB
Where a, b and c are the sides of the triangle.
Substituting with the values from the question gives:
b²=28²+28²-2*38*28*Cos 92
b²=2302.26
b=√2302.26
=47.98
The side b=48.0 to the nearest tenth.
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