If `veca,vecb` are unit vectors and `theta` be the angle between them show tat `sin((theta)/(2)) = 1/2 |veca-vecb|`

Let vecaandvecb be two unit vectors and theta is the angle between them Then veca+vecb is a unit vector if

If theta is the angle between the unit vectors veca and vecb , then prove that sin (theta/2)=1/2|veca-vecb|

If veca+vecb=vecc , and a+b=c then the angle between veca and vecb is

Define unit vector vec A and vec B are two vectors and theta is the angle between them. If |vecA xx vecB | = sqrt3(vecA.vecB) , Calculate the value of theta .

If veca+vecb=vecc and a+b=c , find the angle between veca and vecb .

If theta is the angle between the unit vectors veca and vecb , then prove that cos((theta)/2)=1/2|veca+vecb|

If |vecaxxvecb|=veca*vecb , then what is the angle between veca and vecb ?

veca, vecb and vecc are unit vecrtors such that |veca + vecb+ 3vecc|=4 Angle between veca and vecb is theta_(1) , between vecb and vecc is theta_(2) and between veca and vecc varies [pi//6, 2pi//3] . Then the maximum value of cos theta_(1)+3cos theta_(2) is

If veca and vecb are unit vectors, then angle between veca and vecb for sqrt3 ​ veca − vec b to be unit vector is