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En aquest problema cal distingir  tres  triangles: A B Vaixell a les 10:00 Vaixell a les 11:00
El triangle 1 és  obliquangle , i segons el problema té angles A = 75º i B = 32º A B Vaixell a les 10:00 Vaixell a les 11:00
El triangle 2 és  obliquangle , i segons el problema té angles A = 50º i B = 80º A B Vaixell a les 10:00 Vaixell a les 11:00
El triangle 3 és  obliquangle , i segons el problema hem de trobar la distància PQ per tal de conèixer la velocitat del vaixell. P Q A B Vaixell a les 10:00 Vaixell a les 11:00
Per trobar la distància PQ, abans hem de calcular la distància AP del triangle 1, i la distància AQ del triangle 2.  P Q A B Vaixell a les 10:00 Vaixell a les 11:00
[object Object],[object Object],P 75º 32º 32 km Q A B Vaixell a les 10:00 Vaixell a les 11:00
[object Object],P 75º 32º 32 km Q A B Vaixell a les 10:00 Vaixell a les 11:00
[object Object],[object Object],P 50º 80º 32 km Q A B Vaixell a les 10:00 Vaixell a les 11:00
[object Object],P 32 km Q 50º 80º A B Vaixell a les 10:00 Vaixell a les 11:00
Del triangle 3, coneixem l’angle A i els costats AP i AQ. P Q 75º 50º 25º 17’56 km 41’14 km A B Vaixell a les 10:00 Vaixell a les 11:00
[object Object],[object Object],[object Object],P Q 75º 50º 25º 17’56 km 41’14 km A B Vaixell a les 10:00 Vaixell a les 11:00

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Solució problema 2 exercici ta sinus i cosinus

  • 1. En aquest problema cal distingir tres triangles: A B Vaixell a les 10:00 Vaixell a les 11:00
  • 2. El triangle 1 és obliquangle , i segons el problema té angles A = 75º i B = 32º A B Vaixell a les 10:00 Vaixell a les 11:00
  • 3. El triangle 2 és obliquangle , i segons el problema té angles A = 50º i B = 80º A B Vaixell a les 10:00 Vaixell a les 11:00
  • 4. El triangle 3 és obliquangle , i segons el problema hem de trobar la distància PQ per tal de conèixer la velocitat del vaixell. P Q A B Vaixell a les 10:00 Vaixell a les 11:00
  • 5. Per trobar la distància PQ, abans hem de calcular la distància AP del triangle 1, i la distància AQ del triangle 2. P Q A B Vaixell a les 10:00 Vaixell a les 11:00
  • 6.
  • 7.
  • 8.
  • 9.
  • 10. Del triangle 3, coneixem l’angle A i els costats AP i AQ. P Q 75º 50º 25º 17’56 km 41’14 km A B Vaixell a les 10:00 Vaixell a les 11:00
  • 11.