(b) In a right-angled triangle ABC, angleC = 90° and angle B = 60°. If AC = 6 cm,find the lengths of the sides BC and AB.
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given:
c=90
b=60
cos 60=BC/AB
⇒1/2=BC/AB
sin 60=AC/AB
⇒√3/2=6/AB
AB=4√3
BC=2√3
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