In tri. ABC , right angled at B , AB = 5cm and sinC = 1/2 . Determine the lenght of side AC.
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Given: <B = 90° and AB = 5cm, SinC = 1/2
=> SinC =
=> SinC = Sin30°
=> C = 30°
<A + <B + <C = 180° {angle sum property}
=> <A + 90° + 30° = 180°
=> <A = 180° - 120°
=> <A = 60°
CosA =
=> Cos60° =
=>
=> AC = 10cm
So, the length of side AC is 10cm
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