IF `|bar AXbarB=barA.barB|` what is the angle between `barA and bar B`?

IF |bar A+barB=bar A-.barB| what is the angle between barAandbarB?

What is the angle between (bari+barj) and (bari-barj) ?

What is the angle between vectors veca and vecb ?

If |barA + barB| = |barA - barB| then prove that the angle between A & B is 90^@ .

If veca and vecb be two vectors such that | veca| = sqrt(3) | vecb | =2 and veca. vecb = sqrt(6) what is the angle between veca and vecb ?

If |veca | = 2 , | vecb | = sqrt(11) and veca xx vecb = 2hati + 2hatj + 6 hatk then what is the angle between veca and vecb ?

Do barA + barB and barA - barB lie the same plane?

If bara and barb are unit vectors and theta is the angle between them, show that frac(1)(2)[bara-barb] = sin frac(theta)(2)

Show that the magnetic flux through a surface of area A placed in a uniform magnetic field B is defined as phi_B = BA cos theta where theta is the angle between vec A and vec B .

Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between T_A and T_B ?