Question

Building A is 40m high.The angle of depression of the top of Building B from the top of A is 26 degrees.if the two buildings are 10m apart,find the height of building B

Answer 1

Draw a diagram. It should be clear that if B is h meters tall,

(40-h)/10 = tan 26°

Answer 2

Factorise 4xy²-x³-yx²+4y³