The angles of elevation of the top of a pole from two points distant \( \mathrm{s} \) and \( \ma...

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The angles of elevation of the top of a pole from two points distant \( \mathrm{s} \) and \( \mathrm{t} \) from its foot and in the same straight line with it are complementary. Then the height of the pole is
a. \( \mathrm{st}^{2} \)
b. \( \frac{\sqrt{\mathrm{s}}}{\mathrm{t}} \)
c. \( \sqrt{\mathrm{st}} \)
d. \( \frac{\mathrm{s}}{\mathrm{t}} \)
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