Math, asked by nidhanariza, 10 hours ago

Please answer me....?

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Answered by amannscharlie

1

a)

∠B = 90° , AC = 5cm

sinC = opp/hyp = AB/AC 4/5

•°• AB = 4 cm

b)

Pythagoras theorem

5² = 4² + BC²

25 - 16 = BC²

9 = BC²

√9 = BC

BC = 3 cm

cosC = adj/hyp = BC/AC = 3/5

•°• cosC = 3/5

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