# Thread: Do you know vectors and calculating them buggers?

1. ## Do you know vectors and calculating them buggers?

(3s-5) * (8,s-2)=0

Here is some music while you ponder.

2. Originally Posted by MatsNorway
(3s-5) * (8,s-2)=0
If you are taking the scalar ("dot") product, this is:

(x1, y1) ⋅ (x2, y2) = (x1*x2)+(y1*y2)

But I am not sure what your ordered pairs are here. Do you mean

(3,s-5) * (8,s-2)=0?

3. Quote from the book.

find s with calculations so that (3s,-5) stands directly (90deg i guess) on to(8,s-2)

sorry if the first was incorrect set up.

4. Originally Posted by Coriolis
If you are taking the scalar ("dot") product, this is:

(x1, y1) ⋅ (x2, y2) = (x1*x2)+(y1*y2)

But I am not sure what your ordered pairs are here. Do you mean

(3,s-5) * (8,s-2)=0?
Originally Posted by MatsNorway
Quote from the book.

find s with calculations so that (3s,-5) stands directly (90deg i guess) on to(8,s-2)

sorry if the first was incorrect set up.
Yeah, the dot product should get you the answer you're looking for. Have you tried it yet?

5. S= -10/19

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