The projection of the vector î + 3 ĵ + 7 k̂ on the vector 7 î – ĵ + 8k̂ is :
A. \(\frac{60}{\sqrt{114}}\)
B. \(\frac{30}{\sqrt{115}}\)
C. \(\frac{8}{\sqrt{111}}\)
D. \(\frac{7}{\sqrt{114}}\)
Answer:A
The projection of the vector î + 3 ĵ + 7 k̂ on the vector 7 î – ĵ + 8k̂ is :
A. \(\frac{60}{\sqrt{114}}\) B. \(\frac{30}{\sqrt{115}}\) C. \(\frac{8}{\sqrt{111}}\) D. \(\frac{7}{\sqrt{114}}\)