vector A is 2cm long and 60degree above x axis in first quadrant vector B is 2cm long and is 60degree below x axis in fourth quadrant. the sum A and B is a vector of magnitude. A)2cm along + y axis B)2cm along + x axis C)2cm along - x axis D)2cm along - y axis
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A + B = 2cm[60o] + 2cm[300o].
X = 2*Cos60 + 2*Cos300 = 1 + 1 = 2 cm.
Y = 2*sin60 + 2*sin300 = 1.73 - 1.73 = 0.
A+B = 2 + 0i = 2cm[0o].
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