What is the angle of elevation of the sun when a tree 7.15m tall casts a shadow 10.1m long

Answer 1

clearly, if the angle is x,

tan(x) = 7.15/10.1

Answer 2

Let angle of elevation be x
Cosx =7.15/10.1
Cosx=0.7
X=cos-1(0.7)
X=45.5