2016 · Q82
If the length of the shadow of a tower is equal to its height, then what is the Sun’s altitude at that time ?
Elementary MathematicsTrigonometry
- A15°
- B30°
- C45°
- D60°
Explanation
Let the tower height be h and its shadow length s = h. Then tan(altitude) = h/s = 1. So the Sun's altitude is arctan(1) = 45° (option C).