Question

You are observing top of your school building at an angle of elevation α from a point which is at d meter distance from foot of the building.Which trigonometric ratio would you like to consider to find the height of the building?

Answer 1

According to question.

Draw diagram or see the attachment.

Trigonometric relation.

tanα = height/base.

So,height = base*tanα

Answer 2

tan alpha is correct answer