# Tree

Between points A and B is 50m. From A, we see a tree at an angle of 18°. From point B, we see the tree at a three times bigger angle. How tall is a tree?

### Correct answer:

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

**algebra**- expression of a variable from the formula
**planimetrics**- right triangle
- triangle
**goniometry and trigonometry**- sine
- cosine
- tangent
- cotangent

#### Units of physical quantities:

#### Grade of the word problem:

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