Question

um barco atravessou um de 58 m de largura. sabendo que a correnteza fez com que ele navegasse com ângulo de 34° em relação à margem, calcule a distância percorrida.

Answer 1

Esboço do sistema
 
                                      M               C               P = ponto de partida
                                      |                                  M = margem
                                      |                                  C = ponto de chegada
                                      |                                  MP = 58 m
                                      |                                  ângulo PMC = 90°
                                      |                                              MPC = 34°
                                      P                                 PC = percurso = ??
                                                       No triangulo retângulo PMC
                                                                          MP/PC = cos 34°
                                                                          PC = MP/(cos 34°)
                                                                                       cos 34 = 0,83
                                                                          PC = 58/0,83
                                                                          PC = 69,9

              A DISTANCIA PERCORRIDA É 70 METROS (aproximado)