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Question

In ΔABC, right-angled at B. AB = 5 cm and ACB=30. Determine the lengths of the sides BC and AC.

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Solution

tan30=ABBCBC=ABtan30

BC=53

AC2=AB2+BC2

AC2=52+(53)2

AC2=25+75

AC=10

Hence sides are 5,53,10cm

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