lemme clear evrything

Resultant iz sum of two vectors...if two vectors are parallel and in same direction....then dere sum will b direct a+b...for e.g 4+3 = 7....

but if d vectorz r in opposite direction..dat iz 180 degree opposite...den detre resultant will b substranction..

nd we'll write..A+(-B)..

when two vectors are equal and opposite....den dere sum(resultant) becomes zero..

for e.g    A+(-A)=0...

got it.

rate me plz if u lykd my answer...

when the two vectors join to form a thete of 90 where cos 90=0  rates please

when the theta formed by joining becomes 90 cos 90=0

the resultant  of two vectors is zero in the following cases:  

1. if calculating dot product, if the vectors are perpendicular to each other.

2. if calculating cross product, if the angle between the vectors is 0 or if they are parallel to each  other.

I think many have confusion about resultant and vector products(dot & cross).

In practice, resultant between two vectors is possible only if it is of same type like displacement,force,velocity etc.

Products vectors is possible mathematically in any case but in reality only between certain vectors there can be any meaningful products. Mostly these vectors will be of different nature.

Eg: Dot product of Force and displacement is work. It is not resultant

       Cross product of  Force and position vector is Torque or moment

There can't be anything like resultant of force and displacement.

Also the magnitude differs! Dot product is A^ .B^=ABCos @

but  their resultant for namesake would have been  A^2+B^2+2ABcos@

When 2 vectors have eq magnitude but angle between them is 180 degree then resultant is 0

R=sq rt(a2+b2+2abcos(T))

=sq rt(a2+a2+2a2cos180)

=sqrt (2a2-2a2)

=0

pls:2 followed by each alphabet denotes square