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1. |
A and B are standing on ground 50 meters apart. The angles of elevation for these two to the top of a tree are 60° and 30°. What is height of the tree? |
A. | $50\sqrt 3 \,{\text{m}}$$ |
B. | $\frac{{25}}{{\sqrt 3 }}\,{\text{m}}$$ |
C. | $25\sqrt 3 \,{\text{m}}$$ |
D. | $\frac{{25}}{{\sqrt 3- 1}}\,{\text{m}}$$ |
Answer» D. $\frac{{25}}{{\sqrt 3- 1}}\,{\text{m}}$$ | |