# Vectors

Find the magnitude of the angle between two vectors u = (3; -5) and v = (10; 6)

## Correct answer:

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Our vector sum calculator can add two vectors given by their magnitudes and by included angle.

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
- scalar product
**arithmetic**- square root
- absolute value
**planimetrics**- triangle
**numbers**- fractions
**goniometry and trigonometry**- cosine

### Units of physical quantities:

### Grade of the word problem:

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