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Help pls:Find all the missing elements

Help pls:Find all the missing elements-example-1

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Explanation:

Using Sine Rule


( \sin(a) )/( |a| ) = ( \sin(b) )/( |b| ) = ( \sin(c) )/( |c| )


( \sin(42) )/(5) = ( \sin(38) )/(a)


a = (5( \sin(38)))/( \sin(42) )


a = 4.6


( \sin(42) )/(5) = ( \sin(100) )/(b)


b= (5( \sin(100)))/( \sin(42) )


b = 7.4

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