Thornton & Marion, Classical Dynamics, 5th Edition Chapter 1. Matrices, Vectors, and Vector Calculus Problem 02. Trigonometric properties of direction cosines Solution For Equation (1.10): Proof) Using Figure 1-4 (a) in the book, let the length of a point P on the line from the origin be , then Therefore, it becomes For…

## Thornton & Marion (5th Edition), Chapter 01, Problem 02 Solution

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