# Forces

In point, O acts three orthogonal forces: F

_{1}= 20 N, F_{2}= 7 N, and F_{3}= 19 N. Determine the resultant of F and the angles between F and forces F_{1}, F_{2}, and F_{3}.### Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**geometry**- analytic geometry
**arithmetic**- square root
**solid geometry**- cuboid
- space diagonal
**planimetrics**- Pythagorean theorem
- right triangle
- triangle
**numbers**- real numbers
**goniometry and trigonometry**- cosine
- arcsine
- arccosine

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