Question 268040: what is the value of side c in a traingle for a=3,b=5 and angle c=60 ? Found 2 solutions by Alan3354, CharlesG2:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! what is the value of side c in a traingle for a=3,b=5 and angle c=60 ?
law of cosines states that c^2 = a^2 + b^2 - 2ab * cos(angle c)
c^2 = 3^2 + 5^2 - 2*3*5*cos(60)
c^2 = 9 + 25 - 30 * cos(60)
cos(60) = 0.5
c^2 = 34 - 30 * 0.5
c^2 = 34 - 15 = 19
c = sqrt(19)
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