urgent exam tomorrow

dear student,

can't figure out your question.

perhaps you want to know what is the angle of elevation if the height of a tower is equal to its shadow.

consider a tower AB.(A the top of the tower, B is the point on the base)

and its shadow BC on the ground.

then angle ACB becomes the angle of elevation  of the top ,right?

so then ,

tan (ACB)=AB/BC=1....from given info.

so angle ACB=45 degrees.as tan 45=1.

 hope this is what you wanted to know.

all the best...