#### Answer

Area = $\frac{1}{2}$* 5*6* sin78°

#### Work Step by Step

Using theorem 11.4.1
The area of the given triangle is = $\frac{1}{2}$ab sinγ
Given a =5 b=6 and γ = 78°
therefore Area = $\frac{1}{2}$* 5*6* sin78°

Published by
Brooks Cole

ISBN 10:
1439047901

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

Area = $\frac{1}{2}$* 5*6* sin78°

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