Answer:
ur hyp would be 9m(cuz that's the length of the pole)
ur opp would be 7.5m
draw a right angle triangle(the 90 degrees on the left side)
the angle u need will be on the bottom left of the triangle.
now u need to use SOH cuz u got hyp and opp.
sin theta =opp/hyp
then u need to do:
sin‐1 opp/adj to find the angle
round to the nearest whole.
I'm not sure if this helped but yeah.