Trig/Bearings problems

1

12345786332

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1, 2 - I don't know what angle I'm supposed to find (unsure on exactly what they mean between the 'angle between planes')
3 - Part C, I'm unsure on exactly how to acquire the length and width.
4 - I made a diagram, yet am unsure on the bearings completely (I thought it would just be 214 degrees)
 

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1, 3. The easiest way to think about the angle between two planes is as the angle between their normal vectors.

6. What length and width are you talking about? Do you mean the coordinates? Aren't they just the cosine and sine of 30 degrees?

10. Show us your picture. The bearing from A to B is not the same as the direction from the origin to B.
 
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