# Observation tower

The observation tower has a height of 105 m above sea level. The ship is aimed at a depth angle of 1° 49' from the tower. How far is the ship from the base of the tower?

### 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**- tangent
- cotangent

#### Units of physical quantities:

#### Grade of the word problem:

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