#### Answer

$b^{2}$ = $a^{2}$ + $c^{2}$ - 2ac cos β

#### Work Step by Step

We know the values of a,c, β
We need to find the value of b
By using theorem 11.4.3
$b^{2}$ = $a^{2}$ + $c^{2}$ - 2ac cos β

Published by
Brooks Cole

ISBN 10:
1439047901

ISBN 13:
978-1-43904-790-3

$b^{2}$ = $a^{2}$ + $c^{2}$ - 2ac cos β

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