Question

10. In the diagram, AB is an advertisement
board perched on a vertical pole BC. Points C
and D are at the same horizontal level. AR = 3 m,
AD = 12 m and BD = 10 m. Find
(a) the angle of elevation of A from D,
(b) the angle of elevation of B from D
(c) the length of BC.​

Answer 1

Answer:

the angle of elevation of B from D it's the anser