First, let's make a sketch.
Let θ be the angle of elevation the string makes with the ground.
From the above sketch;
opposite = 120 and hypotenuse = 650
Using the trigonometric ratio;
[tex]\sin \theta=\frac{opposite}{hypotenuse}[/tex]
[tex]\sin \theta=\frac{120}{650}[/tex][tex]\sin \theta=0.184615[/tex]
Take the arc sin of both-side.
[tex]\theta=\sin ^{-1}(0.184615)[/tex][tex]undefined[/tex]
