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Applications of Dot Product

Let a⃗=i+2j+k...

Question

Let $\to a = i + 2 j + k, \to b = i - j + k a n d \to c = i + j - k,$ a vector in the plane $\to a a n d \to b$ whose projection on $\to c i s \frac{1}{\sqrt{3}} i s . . . . . . . .$

A

3i+j-3k

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B

4i+j-4k

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C

I+j-2k

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D

4i-j+4k

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Solution

The correct option is D
4i-j+4k

verify from options. 4^th option holds good

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Applications of Dot Product

Standard IX Mathematics

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