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Vector vecA is 2 cm long and is 60° abo...

Vector `vecA` is 2 cm long and is 60° above the x - axis in the first quadrant, vector `vecB` is 2cm long and is 60° below the x - axis in the fourth quadrant. Find `vecA + vecB`

Text Solution

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`vecR = vecA + vecB`
`vecR = 2cos 60^(@)hati + 2sin60hatj + 2cos60hati -2 sin60 hatj`
`vecR = 4 cos60hati = 2hati`
`therefore 2cm`, along x-axis.
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