Melody

@@ End of Day Wrap     Mon 22/12/14     Sydney,   Australia      Time 11:30 pm       ♬

Hi all,

Today our answerers were CPhill, Geno3141, Nauseated, Pyramid and Alan.  Thanks guys.

Interest post:

1)  Great Puzzle - We always like puzzles to be shared.  Thanks Anon and Geno.

Speaking for myself I have no need of more registered people.

I mean I think people get a slightly better deal if they are registered, (they get preferential treatment) and it is nice to get to know people but we already have more questions than we can comfortably cope with so if people find it to much trouble or like to be anonymous it really doesn't matter.

It is better for users to be registered because their questions are automatically stored in a personal watchlist so that they do not get 'lost' and they have full access to the message system which is very handy.  Off hand I think that they are the main benefits.  :)

Tues 23/12/14

Linear equation - Just a little different.  Thanks Geno

You are not asked for any info - it is dead quick and simple.

All you need is a username and a password and that is it! 

Do you mean

 $$\frac{d}{dx}\;ln(x)\;=\frac{1}{x}+c$$

thanks for your response anon.

There used to be a facebook register button but it was taken away.  Why do you want that for?

I find the wording of this question confusing.

I will change it to indicate the question that I am answering.   

Three airports A, G, E forms a triangle. Airport G has a bearing of 52 degrees FROM airport A. Airport A has a bearing of 216 degrees FROM airport E. Airport G is 200 feet from Airport A and Airport E is 160 feet from Airport A. How far sorts are airports G and E? What is the bearing of airport E FROM airport G?

I have drawn this diagram to scale.  Getting the sketch right is always the trickiest bit.

Use cosine rule to find the length of EG

Then use sine rule to find angle  $$\theta$$  

The bearing of E from G is (180+52+$$\theta$$ ) degrees

Thanks Chris, I enjoyed your song :)

and Jillybean, I bet you sang it beautifully too.  

Thanks anon 

I have given this the green puzzle icon and I have added it to

Logic Puzzles in the the sticky notes.    

There is a sticky note in the bottom right of this page called.

"How do I type in fractions ?"