Saved Bookmarks
| 1. |
A man observes that when he moves up a distance c metres on a slope, the angle of depression of a point on the horizontal plane from the base of the slope is 30^(@), and when he moves up further a distance c metres the angle of depression of that point is 45^(@). The angle of inclination of the slope with the horizontal is (Man starts from bottom of slope) |
|
Answer» `60^(@)` we GET `(C + c) cot (THETA-30^(@))c cot 15^(@) - c cot 30^(@)` or `cot (theta -30^(@)) = 1` `= theta - 30^(@) = 45^(@)` `:. theta = 75^(@)` |
|