keithrjohnson54 keithrjohnson54

09-05-2018
Mathematics

contestada

for triangle cab find the length of a Side a

for triangle cab find the length of a Side a class=

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calculista calculista

18-05-2018

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

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