Respuesta:
Aplicamos ley de consenos:
[tex]50 = {74}^{2} + {35}^{2} - 2(74)(35) \cos \alpha \\ \frac{74^{2} + {35}^{2} - {50}^{2} }{2 \times 74 \times 35} = \cos \alpha [/tex]
[tex] \cos\alpha = 0.811 \\ \alpha = \cos^{ - 1}(0.811) \\ \alpha = 35.81°[/tex]
