Respuestas

2014-02-02T20:13:01+01:00
Sen B = 280/415 = 0.6747 B = arc sen 0.6747 = 42° 25′

C = 90° - 42° 25′ = 47° 35′


c = a cos B   c = 415 · 0.7381 = 306. 31 m