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alpha = 45°
sen(alpha) = raiz(2)/2
tan(alpha) = 1
Segunda fila:
alpha = 60°
sen(alpha) = raiz(3)/2
cos(alpha) = 1/2
Segunda fila:
sen(alpha) = 1/2
cos(alpha) = raiz(3)/2
tan(alpha) = raiz(3)/3
4a. alpha = 60°
4b. alpha = 30°
4c. betha = 30°