If veca = hati + lambda hatj - 2hatk , v...

If `veca = hati + lambda hatj - 2hatk , vecb=2hati-3hatj-3hatj+5hatk` and `veca.vecb ` = - 20 then the value of `lambda` is equal to

A

2

B

`-2`

C

`-4`

D

4

Verified by Experts

The correct Answer is:

D

Similar Questions

Explore conceptually related problems

If veca = hati-3hatj + a hatk , vecb =hati - 2hatj +5hatk and veca xx vecb = -2 hati +hatj +beta hatk then the value of beta is equal to

If veca=3hati+2hatj+2hatk,vecb=hati+2hatj-2hatk Find veca+vecb and veca-vecb

If veca=2hati+2hatj+3hatk and vecb=2hati-hatj+hatk , then the value of (veca+vecb).(veca-vecb) is equal to

If vectors hati-3hatj+5hatk and hati-3hatj-ahatk are equal vectors, then the value of a is

If the vectors 2hati + 2hatj + 6hatk, 2hati + 6hatj + 2hatk+ lambdahatj+6hatk and 2hati - 3hatj + hatk are coplanar, then the value of lambda is

If veca=hati+hatj-hatk,vecb=2hati+3hatj+hatk and theta is the angle between them, then tantheta =

Find P,if veca=-2hati-hatj+2hatk and vecb=hati+phatj+hatk and vecaxxvecb=3hati+4hatj+5hatk .

If the vectors veca=hati+hatj+hatk,vecb=2hati-hatj+hatk and vecc=khati-2hatj+3hatk are coplaner then find the value of k.

Find |vecaxxvecb| ,If veca=2hati-hatj+3hatk and vecb=hati+2hatj-hatk

If veca=xhati+2hatj-zhatk and vecb=3hati-yhatj+hatk are two equal vectors then write the value of x+y+z.