For triangle cab find the length of a Side a

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asked Feb 8, 2019 200k views

1 Answer

Alvi · Answer 1 · 2019-02-14T11:39:57+0000

we know that
the law of cosines establishes that
a²=c²+b²-2*c*b*cos A
in this problem
a=?
b=21
c=32
A=40°
a²=32²+21²-2*32*21*cos 40-----> a²=435.44---------> a=20.87 units

For triangle cab find the length of a Side a

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