Question

What is the angle between the i+j+k and j

Answer 1

Answer:

Let,A=I+j+k

Let,@ be the angle made by vector A with y axis.

now,|A|=√1^2+1^2+1^2

=√3

we have,

cos @=Ay/A

i.e. cos@=1/√3

i.e. @=cos^-1 1/√3

hey mate here is the answer...i have taken the angle as @ this symbol for my help to solve the problem..and in the keypad I have not the symbol of theta,alpha etc... hope it helps you