# Resultant force

Calculate mathematically and graphically the resultant of three forces with a common center if:

F1 = 50 kN α1 = 30°

F2 = 40 kN α2 = 45°

F3 = 40 kN α3 = 25°

F1 = 50 kN α1 = 30°

F2 = 40 kN α2 = 45°

F3 = 40 kN α3 = 25°

### Correct answer:

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

**geometry**- analytic geometry
- vector
**arithmetic**- addition
**planimetrics**- Pythagorean theorem
- right triangle
- triangle
**goniometry and trigonometry**- sine
- cosine
- arctangent

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