Quantcast Trigonometry??? - XP Math - Forums
XP Math Home Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment PDF Version

Go Back   XP Math - Forums > Welcome > Off-Topic Discussion

Thread Tools Display Modes
Old 08-03-2007   #1
Posts: n/a
Default Trigonometry???

In ΔABC, what is length of the angular bisector of angle A if 'a' is the side opposite to vertex A, 'b' is the side opposite to vertex B and 'c' is the side opposite to vertex C?Please explain the steps clearly.I actually know what an angular bisector is.I want the angular bisector expressed mathematically...i.e. in general terms
Old 08-03-2007   #2
usha n
Posts: n/a

angularbisector means symetrry of the angle! like if an angle is 90degree then bisector will be 45 degree.Vertex is to lines joinin point!i hope dis helps
Old 08-03-2007   #3
Posts: n/a

area of the whole tringle = sum of the two triangles produced by the bisector. let the length of the bisector is L.then 1/2 Lcsin A/2 + 1/2 LbsinA/2 = 1/2 bc sin Athen 1/2 Lcsin A/2 + 1/2 LbsinA/2 = 1/2 bc 2sin A/2 cos A/2 from which L = 2bc cosA/2 / (b+c)

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 08:11 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XP Math