`veca "पर " (vecb + vecc) ` का प्रक्षेप ज्ञात कीजिए जहाँ
` veca = (2hati - 2hatj + hatk), vecb = (hati + 2hatj - 2hatk) ` तथा
` vecc = (2 hati - hatj + 4hatk)`

Explanation

दिया हैं-
`vecb = (hati + 2hatj - 2hatk) `
` vecc = (2 hati - hatj + 4hatk)`
तब
` (vecb + vecc) `
`= (hati + 2hatj - 2hatk) ``+ (2hati - hatj + 4hatk)`
` = (1 + 2) hati`` + (2-1) hatj ``+ (-2 + 4) hatk `
`= ( 3hati + hatj + 2hatk)`

अब
` veca " पर" (vecb + vecc)` का प्रक्षेप

`= ((vecb + vecc) . veca)/(|veca|)`

`= ((3hati + hatj + 2hatk).(2hati - 2hatj + hatk))/(sqrt(2^(2) + (-2)^(2) + 1^(2)))`

` = (6 - 2 + 2)/(sqrt(9))`

` = (6)/(3) = 2`