1.

If a, b, c are distinct real numbers and P, Q, R are three points whose position vectors are respectively ahati + b hatj+ c hatk , b hati + c hatJ + a hatk and c hai + a hatj + b hatk, then angle QPR =

Answer»

`COS^(-1) (a +B+ c)`
`pi/2`
`pi/3`
`cos^(-1) ( (a^2 + b^2 + c^2) /(abc) ) `

ANSWER :C


Discussion

No Comment Found

Related InterviewSolutions