Me ayudan despejando "x"?? Por favor!!!
-4sen(12x) - 3cos(12x) = 0
-4sen(12x) - 3cos(12x) = 0
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4sen(12x)=-3cos(12x)
sen(12x)/cos12x= -3/4
Tan(12x)=-3/4 ...... aplicamos arco tangente
12x=36(aproximadamente)
X=3