Respuesta :

caylus
Hello,

Using Al'Kashi s' theorem (théorème de Pythagore généralisé), we have:

27.32²=17.21²+a²-2*17.21*a*cos(27°)
==> a²+4.194280000... a-450.1983=0
Positive solution is a=19.2239153057...

Answer D.

ACCESS MORE
EDU ACCESS