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What is the component of (3hati+4hatj) a...

What is the component of `(3hati+4hatj)` along `(hati+hatj)` ?

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Component of `vecA` along `vecB` is given by `(vecA.vecB)/B` hence required component
`((3hati + 4hatj).(hati + hatj))/(sqrt2) = 7/(sqrt2)`
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