Finding angles for cross product magnitudes

[Jrlinton]

The first part of the problem was easy enough as was finding the directions of the other two, but I am having trouble finding the correct angle for the last two cross products in order to find the magnitude.

 

[BvU]

Hello, Jr,

Please don't delete parts of the template. You need them, see guidelines

Homework Statement

Homework Equations

The Attempt at a Solution

In your case number 2 in particular. What do you know of the angle you need ? And what do you need for the cross product ?

 

[Jrlinton]

I have given all information that was provided. Vector A has a magniude of 8 along the positive x axis, Vector B starts at the end of vector A running parallel to the y-axis and a magnitude of 6, Vector C connects the head of Vector B to the tail of Vector A. basically a 45-45-90 right triangle is created by the vectors.

 

[BvU]

I know you have. But I can't see what you have done so far and why you think you are stuck now. So please show which relevant equation you are trying to apply and show your attempt at solution. I want to help you find the right next step yourself -- the answer is after all not important; it's your ability to do the exercise yourself that we want to achieve ...

And the 3 4 5 Pythagorean triangle is definitely not a 45 45 90 !