Hi guys.

Am currently stuck with this question asking me to find the greatest possible angle of elevation..

Need help urgently thanks !

Attachment 18810

Printable View

- Sep 2nd 2010, 10:01 PMliukawaTrigonometry - Angle Of Elevation
Hi guys.

Am currently stuck with this question asking me to find the greatest possible angle of elevation..

Need help urgently thanks !

Attachment 18810 - Sep 2nd 2010, 10:47 PMundefined
It's unclear whether the BC at the end means line or line segment. Possibly it won't matter, I haven't run the numbers. Anyway find the point on BC that is closest to A, call the point P, then look at triangle PAD.

Of interest is whether angle ABC is acute, obtuse, or right. - Sep 2nd 2010, 11:02 PMliukawa
- Sep 2nd 2010, 11:22 PMundefined
- Sep 2nd 2010, 11:25 PMundefined
Note: You can save yourself some time by using that area of a triangle (using the usual letters) is (1/2)absinC and also (1/2)bh^2.