# Forces

Forces with magnitudes F1 = 42N and F2 = 35N act at a common point and make an angle of 77°12'. How big is their resultant?

## Correct answer:

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See also our trigonometric triangle calculator.

Try conversion angle units angle degrees, minutes, seconds, radians, grads.

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

**geometry**- vector
**arithmetic**- square root
- addition
**planimetrics**- Pythagorean theorem
- right triangle
- triangle
- diagonal
- rhomboid
**numbers**- mixed numbers
**goniometry and trigonometry**- sine
- cosine

### Units of physical quantities:

### Grade of the word problem:

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