If 1st vector: A2nd vector: Btheir Resltunt is RNow, Twice of A vector

1.	If 1st vector: A2nd vector: Btheir Resltunt is RNow, Twice of A vector gives you twice of resultant.Question: Find the angle of the vectors A,B
Answer» Explanation: here, ..... B+A=R SO.... \|a+b\|^2=a^2+b^2+2ab cos theta......1 acc, to GIVEN problem ...... 2× \|a+b\|^2=(2A)^2+b^2+2×2ab cos theta......2 on SUBTRACTING 2-1,,,,, \|a+b\|^2=3a^2+2ab cos theta r^2=3a^2+2ab cos theta theta=cos ^-1{(r^2-3a^2)/2ab}

If 1st vector: A2nd vector: Btheir Resltunt is RNow, Twice of A vector gives you twice of resultant.Question: Find the angle of the vectors A,B

Answer»

Explanation:

here, .....

B+A=R

SO....

|a+b|^2=a^2+b^2+2ab cos theta......1

acc, to GIVEN problem ......

2× |a+b|^2=(2A)^2+b^2+2×2ab cos theta......2

on SUBTRACTING 2-1,,,,,

|a+b|^2=3a^2+2ab cos theta

r^2=3a^2+2ab cos theta

theta=cos ^-1{(r^2-3a^2)/2ab}

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If 1st vector: A2nd vector: Btheir Resltunt is RNow, Twice of A vector gives you twice of resultant.Question: Find the angle of the vectors A,B

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