Home
Class 12
MATHS
The unit veotor in the direction of the ...

The unit veotor in the direction of the vector `vec(AB)if A ( -2, -1, 3) and B = (1,1,0) is alpha i + beta j + gammak,` then ` alpha + beta ` is

A

`(3)/(sqrt22)`

B

`(5)/(sqrt22)`

C

`(-3)/(sqrt22)`

D

`(-5)/(sqrt22)`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

If a=2i+2j-k, b=alphai+betaj+2k and |a+b|=|a-b| , then alpha+beta is equal to

Let alpha and beta be the roots of the equation px^(2) + qx + r=0 . If p, q, r in AP and alpha+beta =4 , then alpha beta is equal to

If alpha and beta are the roots of the equations x^(2) - 6x +a=0 and satisfy the relations 3 alpha + 2 beta= 16 , then the value of a is :

If alpha and beta are the roots of the equation x ^(2) + 3x - 4 = 0 , then (1)/(alpha ) + (1)/(beta) is equal to

If x^(2) + px + q = 0 has the roots alpha and beta , then the value of (alpha - beta)^(2) is equal to

If cos alpha + 2cos beta+ 3 cos gamma = 0, sin alpha + 2sin beta +3 sin gamma= 0 and alpha + beta + gamma= pi , then sin 3alpha + 8 sin 3 beta + 27 sin 3 gamma =