Two vectors a and b are drawn from a common point and c=a+b, then angle between a and b is
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Step-by-step explanation:
Under root a square plus b square plus two a b cos theta equal to C
a square + b square + 2 a b cos theta is equal to c square
2a b cos theta is equal to C square minus A square minus b square
cos theta is equal to C square minus A square minus b square whole divided by2 A B
theta is equal to Cos inverse (c square minus A square minus b square) upon 2 a b
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