Opposite 78434
We see the tree on the opposite bank of the river at an angle of 15° from a distance of 41m from the river bank. From the bank of the river, we can see at an angle of 31°. How tall is the tree?
Correct answer:

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You need to know the following knowledge to solve this word math problem:
- algebra
- equation
- expression of a variable from the formula
- planimetrics
- right triangle
- triangle
- goniometry and trigonometry
- tangent
Units of physical quantities:
Grade of the word problem:
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