Jazminecollier
Jazminecollier Jazminecollier
  • 14-05-2018
  • Mathematics
contestada

Find the magnitude and direction angle for the vector v = 3 cos 123°i + 3 sin 123°j.

A. 3√2, 57°
B. 3√2, 123°
C. 3, 57°
D. 3, 123°

Respuesta :

carlosego
carlosego carlosego
  • 24-05-2018
The vector written in its generic form is given by:
 v = lvl cos theta ° i + lvl without theta ° j
 Where.
 lvl: magnitude of the vector
 theta: angle of the vector with respect to the x axis.
 For this case we have the following vector:
 v = 3 cos 123 ° i + 3 without 123 ° j
 Where,
 lvl = 3
 theta = 123 °
 Answer:
 
The magnitude and direction angle for the vector v is:
 
D. 3, 123 °
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