1. Δ ABC is right angled at B. If m∠A = 30°. What is the length (in cm) of AB, if AC = 8 cm?
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By: anil on 05 May 2019 01.46 am
Given : AC = 8 cm and $$angle$$ A = $$30^circ$$ To find : AB = ? Solution : In $$ riangle$$ ABC, => $$cos(30^circ)=frac{AB}{AC}$$ => $$frac{sqrt3}{2}=frac{AB}{8}$$ => $$AB=frac{8sqrt3}{2}=4sqrt3$$ cm => Ans - (B)
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