15. In A ABC, right angle is at B, AB = 5 cm and ZACB = 30°. Determine the
lengths of the sides BC and AC.
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Answer:
tan30∘=BCAB⇒BC=tan30∘AB
BC=53
AC2=AB2+BC2
AC2=52+(53)2
AC2=25+75
AC=10
Hence sides are 5,53,10cm
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