Trig Question! NEED HELP! (1 Viewer)

[HSCstudent08]

hey guys,
could you help me with this question? (3D Trig)

From a boat A, due wast of a cliff, the angle of elevation of the top of the cliff is 26 degrees. From another boat B, which is a bearing of 150 degress from the cliff, the angle of elevation of the top of the cliff is 20 degrees. If the two boats are 520 metres apart:
(i) show that angle AFB=60 degrees, where F is the foot of the cliff

(Would be nice if you could also computer-draw a diagram of this)

thanks

 

[~Fire Jade~]

Ummm, I would do a computer drawing but I don't know how to.
From North to South (clockwise), it's 180 degrees...right?
Boat B is at a bearing of 150 degrees.
Therefore, from Boat B to South...there is 30 degrees.
According to qn, Boat A is west. Therefore, from south to west there is 90 deg (go draw a compass).
U add up 90 to 30= 120 deg= Angle AFB...which isn't 60 degrees. I don't know why but I've tried. Anybody else willing to have a go?

 

[HSCstudent08]

whoops sorry wast = east!!!

THANKS MATE !!! QUESTION resolved...