ma1495448
ma1495448 ma1495448
  • 01-07-2017
  • Mathematics
contestada

Prove that: sin^3A+ sin^3(120+A) +sin^3(240+A)= -3/4 sin3A

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mjriedel19osc9u0 mjriedel19osc9u0
  • 01-07-2017
sin^3A+ sin^3(120+A) +sin^3(240+A)= -3/4 sin3A= Sin /\ 4/5A+ Sin/\2 because u talk half of it then... (120 +a {A= 2} =122) Hope this helps
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