Question

Triangle ABC
Find a and B

Answer 1

3gonomet3

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use the sine's rule !

55 / sin C = b / sin B

55 / sin 90 = b / sin 60

55 / 1 = b / ( 1/2 √3 )

b = 55√3 / 2

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a / sin A = 55 / sin C

a / sin 30 = 55 / sin 90

a / ( 1/2 ) = 55 / 1

a = 55/2

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