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Simple vectors Q (1 Viewer)

skillz

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A and B are points defined respectively by the position vector a= i+2j-k and b=-i+j-3k, find the magnitude of the angle between vectors AB and a

AB = -2i-j-2k and mag AB = 3


another q.

C and D are points defined respectively by position vcetors c and d. if |c|=5 |d|=7 c.d=4 find |cd|
thanks.
 
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Raginsheep

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Only in the context of complex numbers.

We start on vectors in uni.
 

Raginsheep

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I'd wait for one of the second year uni students to pop in as they do from time to time.
 

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