Question

(b) What is the projection of a vector. Find the projection of vector
î + 3j + 7k on vector 7i + ſ +8ſ.​

Answer 1

Step-by-step explanation:

HEY friend.....

$let \: a = i + 3j + 7k \: and \: \\ \\ b = 7i - j + 8k \\ \\ now \: projection \: of \: vector \: \\ \\ a \: on \: b \: is \: given \: by \: \\ \\ \frac{1}{b} (a.b) = \frac{1}{ \sqrt{ {7}^{2} + {( - 1)}^{2} + {8}^{2} } } \\ \\ (1(7) + 3( - 1) + 7(8)) \\ \\ = \frac{7 - 3 + 56}{ \sqrt{49 + 1 + 64} } = \frac{60}{ \sqrt{114} }$

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Answer 2

Answer:

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