# Trigonometry word problem

• May 24th 2011, 12:54 PM
nicholas604
Trigonometry word problem
A hang glider is observed from a field due east at an angle of elevation of 50 degree. The hang glider is 2 km away from the observer at this first field. The angle of elevation from a second field is 23 degree. The second field is 3.5 km away from the first at a bearing of 155 degree. How high is the hang glider.

This part is really confuses me----->The angle of elevation from a second field is 23 degree. The second field is 3.5 km away from the first at a bearing of 155 degree. How high is the hang glider.

• May 24th 2011, 02:30 PM
TKHunny
Do you know that "Angle of Elevation" is ALWAYS measured from the Horizontal?

I'm a little puzzled by the "2 km away" hint. Is that horizontal distance or direct line of sight?
• May 24th 2011, 03:20 PM
nicholas604
Yes I know that angle of elevation is always measured from the horizontal but the second field has to angle such as 23angle and bearing 155 angle.

The answer from my text book is 1.8km; I hope you can figure it out.Thank you.

Quote:

Originally Posted by TKHunny
Do you know that "Angle of Elevation" is ALWAYS measured from the Horizontal?

I'm a little puzzled by the "2 km away" hint. Is that horizontal distance or direct line of sight?

• May 24th 2011, 06:44 PM
TKHunny
Label glider shadow on the ground, with exactly overhead sun, Point G