eva-lewis_60bcd5f375349
eva-lewis_60bcd5f375349
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Temos 2 casos a considerar: 1 caso)cos²x-sen²x=0 2 caso)2cos²x+3senx=0 Vamos resolver o caso 1: cos²x=sen²x Porém, sabemos que sen²x+cos²x=1 =>sen²x=1/2 =>senx=sen 45 (raiz(2)/2) ou senx=-sen45=sen225 Se senx…