Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2014-07-25 20:46:50

headstillhurts
Guest

Unit circle / Geometry

I know the basics of unit circle but I'm not even remotely aware about where to start with this problem. Any help pointing me in the right direction would be great. Cheers
image.jpg

#2 2014-07-25 21:06:53

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,380

Re: Unit circle / Geometry

hi headstillhurts

Welcome to the forum.  smile

When AD is a diameter, the angle ABD will always be 90 (or pi/2) so that should get you started.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

#3 2014-07-25 22:07:49

Nehushtan
Member
From: London
Registered: 2013-03-09
Posts: 613
Website

Re: Unit circle / Geometry

It’s a unit circle so its radius is 1.

Last edited by Nehushtan (2014-07-25 23:44:19)


156 books currently added on Goodreads

Offline

#4 2014-07-25 22:50:45

headhurts
Member
Registered: 2014-05-04
Posts: 8

Re: Unit circle / Geometry

bob bundy wrote:

hi headstillhurts

Welcome to the forum.  smile

When AD is a diameter, the angle ABD will always be 90 (or pi/2) so that should get you started.

Bob

Thanks Bob. It took me some time to figure out what the question was even asking. But together with your answer, the whole thing finally clicked.

PS Had problems logging in with my normal account for some reason. So just used a temp account to put that question up earlier.

Offline

Board footer

Powered by FluxBB