9 Vectors and Oblique Triangles


After completion of this chapter, the student should be able to:

  • Distinguish between a scalar and a vector

  • Add vectors graphically by the polygon method and the parallelogram method

  • Resolve a vector into its x- and y-components

  • Add vectors by components

  • Solve application problems involving vectors

  • Solve oblique triangles using the law of sines and/or the law of cosines

  • Solve application problems involving oblique triangles

In many applications, we often deal with such things as forces and velocities.

To study them, both their magnitudes and directions must be known. In general, a quantity for which we must specify both magnitude and direction is called a vector.

In basic applications, a vector ...

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