The components of vector are:

Ax = + 6.0
Ay = -6.5

What is the angle measured counterclockwise from the x-axis to vector ?

133°
313°
137°
47°
223°

Respuesta :

tanΦ=-6.5/6.0
tanΦ=-1.083
Φ=1/tan(-1.083)
Φ=47°

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