Register to reply

Problem

by Werg22
Tags: None
Share this thread:
Werg22
#1
Oct5-05, 09:05 PM
P: 1,520
http://img338.imageshack.us/img338/9397/circle9sr.jpg

The question goes;

B is the center of the arc AC and BD is perpendicular to AE, proove that
AD = DE + EC

I've been on it for hours now and I can't find anything...
Phys.Org News Partner Science news on Phys.org
Suddenly, the sun is eerily quiet: Where did the sunspots go?
'Moral victories' might spare you from losing again
Mammoth and mastodon behavior was less roam, more stay at home
amcavoy
#2
Oct5-05, 09:18 PM
P: 668
Quote Quote by Werg22
http://img338.imageshack.us/img338/9397/circle9sr.jpg

The question goes;

B is the center of the arc AC and BD is perpendicular to AE, proove that
AD = DE + EC

I've been on it for hours now and I can't find anything...
The way I am thinking of is fairly long, but here it is:

Use the law of cosines. Note that angle BAC=BCA.

[EC]2=[AE]2+[AC]2+2cosθ

where θ is the angle EAC. Try working it out and let me know if you get stuck.

Alex
amcavoy
#3
Oct7-05, 11:11 AM
P: 668
Sorry, that should be ...-2[AE][AC]cosθ in the above equation.

Alex


Register to reply

Related Discussions
HARD problem on mathematical problem and fourier series Math & Science Software 0
Thermal Stress Problem + Tensions Problem Engineering, Comp Sci, & Technology Homework 4
Problem with find angle btw vectors (magnetism problem) Introductory Physics Homework 2
Is Mexico's racism problem driving the U.S. immigration problem? Current Events 8
Having a problem with a fairly early Physics with Calculus 1 problem Introductory Physics Homework 4