VECTOR 3D | Part 2

If A is 3//4 part of B,B is 1//2 part of C is 4//5 part of D then find value of A:B:C:D ?

3) Rigntui If ? is acute angle and the vector (sin ?)i + (cos ?)) is perpendicular to the vector i- 3 j then (EAM-2000) D6 2) 3) 4)

Show that the dot product of 3 D vector is a scalar.

If 686 is divided, into four parts, in proportions 1/2 :2/3:3:4 then the first part is ? A)52 B)42 C)56 D)48

If vec a\ a n d\ vec b are two vectors of magnitudes 3 and (sqrt(2))/3 respectively such that vec axx vec b is a unit vector. Write the angle between vec a\ a n d\ vec bdot

The vectors a and b are not perpendicular and c and d are two vectors satisfying b xx c=b xx d and a.d=0. The vectors d is equal to

Rahul,Arun and Sumit started a business. Rahul invested (1)/(2) part Arun invested (1)/(3) part, Arun part and rest of the capital was invested by sumit.The ratio of their profits will be 2:3:1 b.2:1 c.2:3:6 d.3:2:5