Question

the angle of elevation from a point a on horizontal ground to the top of a 20m high pole is 73 degrees. a rope is attached to the top of the pole to point a. find the lenght of the rope

Answer 1

\[h=20\]\[\theta=73\]\[r=?\]
\[\sin(\theta)=h/r\]
\[r=h/sin(\theta)\]
\[r=h/sin(\theta)\]
\[r=20/sin(73)=20.914m\]