If `veca,vecb,vecc` are 3 unit vectors such that `vecaxx(vecbxxvecc)=vecb/2`then (`vecb and vecc` being non parallel). (a)angle between `veca & vecb` is `pi/3` (b)angle between `veca` and `vecc` is `pi/3` (c)angle between `veca` and `vecb` is `pi/2` (d)angle between `veca` and `vecc` is `pi/2`

If veca, vecb, vecc are non-coplanar unit vectors such that vecaxx(vecbxxvecc)=(vecb+vecc)/(sqrt(2)) then the angle between veca and vecb is

Let veca, vecb and vecc be three unit vectors such that vecaxx(vecbxxvecc)=(sqrt(3))/2(vecb+vecc) . If vecb is not parallel to vecc , then the angle between veca and vecb is

let veca, vecb and vecc be three unit vectors such that veca xx (vecb xx vecc) =sqrt(3)/2 (vecb + vecc) . If vecb is not parallel to vecc , then the angle between veca and vecb is:

If veca,vecb,vecc are three coplanar unit vector such that vecaxx(vecbxxvecc)=-vecb/2 then the angle betweeen vecb and vecc can be (A) pi/2 (B) pi/6 (C) pi (D) (2pi)/3

If veca,vecb,vecc are unit vectors such that veca is perpendicular to the plane vecb and vecc and angle between vecb and vecc is (pi)/(3) , than value of |veca+vecb+vecc| is

If veca,vecb,vecc be three that unit vectors such that vecaxx(vecbxxvecc)=1/2 vecb, vecb and vecc veing non parallel. If theta_1 is the angle between veca and vecb and theta_2 is the angle between veca and vecb then (A) theta_1 = pi/6, theta_2=pi/3 (B) theta_1 = pi/3, theta_2=pi/6 (C) theta_1 = pi/2, theta_2=pi/3 (D) theta_1 = pi/3, theta_2=pi/2

If veca,vecb and vecc are non coplanar and unit vectors such that vecaxx(vecbxxvecc)=(vecb+vecc)/sqrt(2) then the angle between vea and vecb is (A) (3pi)/4 (B) pi/4 (C) pi/2 (D) pi

If veca, vecb,vecc are unit vectors such that veca.vecb = 0= veca.vecc and the angle between vecb and vecc is pi//3 then the value of |vecaxxvecb -veca xx vecc| is

If veca, vecb,vecc are unit vectors such that veca is perpendicular to the plane of vecb, vecc and the angle between vecb,vecc is pi/3 , then |veca+vecb+vecc|=

Let veca,vecb and vecc be three unit vectors such that vecaxx(vecbxxvecc)=sqrt(3)/2(vecb+vecc) . If vecb is not parallel to vecc then the angle between veca and vecb is (A) (5pi)/6 (B) (3pi)/4 (C) pi/2 (D) (2pi)/3