Question

If the height of a tower and the distance of the point of observation from its foot, both, are increased by 10%, then the angle of elevation of its top ____________.

Options

• increases

• decreases

• remains unchanged

• have no relation

Answer 1

If the height of a tower and the distance of the point of observation from its foot, both, are increased by 10%, then the angle of elevation of its top remains unchanged.

Explanation:

Since,

`"tan" theta = "h"/"x"`

Where h is height and x is the distance from the tower,

If both are increased by 10%, then the angle will remain unchanged.