Anniechi9xgripadria Anniechi9xgripadria

08-08-2016
Mathematics

contestada

In ∆ABC, if a = 8.75 centimeters, c = 4.26 centimeters, and m B = 87°, What is the length of b to two decimal places?

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MachineQ MachineQ

13-08-2016

you will need the law of cosines to solve it

b2=a2+c2−2a×c×cos(B)

just substitute your values

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Hussain514 Hussain514

13-08-2016

using law cosines:
b^2= a^2+c^2-2acCosb
= 76.56+18.14-74.55(0.05)
= 94.7 - 3.9
= 90.8
b= sqrt 90.8
b= 9.52

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