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**SuperLynx****Member**- Registered: 2009-06-28
- Posts: 322

Hi. I'm looking for some help in understanding Trigonometry and Algebra. Specifically, vectors, matrices & scalars. I hope someone can help me, I have searched on the subject, although nothing I could understand. How do you multiple vectors, what is a dot product, I suppose best to start with that, I've already begun learning, but any resource or your own personal explanation would be helpful.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,759

hi SuperLynx

The MathsIsFun teaching pages cover the dot product. I would recommend this:

http://www.mathsisfun.com/algebra/vecto … oduct.html

And at the bottom there are some "test yourself" questions.

Why not start there ?

Also, if you search my posts you'll find I've helped people in the past on vector topics.

Post here if there's still a difficulty.

Bob

Children are not defined by school ...........The Fonz

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

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**SuperLynx****Member**- Registered: 2009-06-28
- Posts: 322

This is going to sound like a dummy, which I am since I have forgotten some of this stuff. Do you know any real basics teachings so I can build from that ?

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,759

hi SuperLynx

No dummy. Everyone has to start somewhere. But how basic do you want? (see diagram)

Bob

Children are not defined by school ...........The Fonz

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

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**SuperLynx****Member**- Registered: 2009-06-28
- Posts: 322

Isn't that vector 2,7 ?

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,759

hi SuperLynx

Vectors are used in many ways. I was trying to show a movement vector of 6 across and 2 up. That's why I put an arrow on the red line. Sometimes vectors are written as a row rather than a column. I prefer the column format because you don't have any confusion with coordinates.

Have a look at

http://www.bbc.co.uk/bitesize/higher/ma … evision/1/

Bob

Children are not defined by school ...........The Fonz

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

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