Trigonometry: Special Angles
Favorites|Homepage
Subscriptions | sitemap
HOME > > Trigonometry: Special Angles

Trigonometry: Special Angles

[From: ] [author: ] [Date: 12-04-12] [Hit: ]
If someone could help me please.Stefan has set up a right angle EFG on one side of river such that FG measures 20m and angle DEF measures 60 degrees. Without using a calculator, determine the width, DG, of the river.......
This is a question from my Grade 11 Trig homework.

I really do not understand it. If someone could help me please.

Question:

Stefan has set up a right angle EFG on one side of river such that FG measures 20m and angle DEF measures 60 degrees. Without using a calculator, determine the width, DG, of the river.

-
use your exact values table a/sina = b/sinb
a/sin90 = 20/sin60

20Sin90
------------
Sin60

= sin 90 = 1
and sin 60 = sqrt(3/4) THESE ARE THE EXACT VALUES

20(1) / sqrt(3/4)

= 20/ sqrt(3/4)
1
keywords: Angles,Special,Trigonometry,Trigonometry: Special Angles
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .