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unit vectors

Asked by 12th June 2008, 9:20 AM
Answered by Expert
Answer:

use the [A1 + A2] [A1 + A2] = 3

find the value of A1.A2 from the above formula

now from the question (A1+A2) • (2A1+ A2) multiply the terms and put the value of A1.A2 from above and the values of [A1]2 and [A2]2 which is 1.

Answered by Expert 16th July 2008, 5:22 PM
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