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provar cos2(x)−sin2(x)=2cos2(x)−1
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Solution
Verdadeiro
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Domínio de (a3)3:−∞<a<∞
Imagem de (a3)3:−∞<f(x)<∞
Pontos de intersecção com o eixo de (a3)3:Y intersepta:(0,0)