In a two-dimensional Cartesian system,the x-component of a vector is known,and the angle between vector and x-axis is known.Which operation is used to calculate the magnitude of the vector? (taken with respect to the x-component)
A)dividing by cosine
B)dividing by sine
C)multiplying by cosine
D)multiplying by sine

Question

Quizplus · Accepted Answer

Dividing the x-component of a vector by the cosine of the angle between the vector and the x-axis gives the magnitude of the vector, according to the definition of the cosine function in a right triangle.

In a Two-Dimensional Cartesian System,the X-Component of a Vector Is