Question

in adjoining figure,if AB= 12cm then find AB and BC
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Answer 1

Answer:

tan30=BC/AB

1/√3=BC/12

BC=12/√3=4√3

sin 60=AB/AC

√3/2=12/AC

AC=2×12/√3=8√3

You can also calculate AC in the following way

AC^2= AB^2+BC^2