Question

pls help me it's very urgent​

Answer 1

Answer:

2

Step-by-step explanation:

let a = xi+yj+zk

a×i = zj-yk

|a×i|^2=y^2+z^2

similarly

${ |a \times i| }^{2} = {y}^{2} + {z}^{2}$

${ |a \times j| }^{2} = {x}^{2} + {z}^{2}$

${ |a \times z| }^{2} = {x}^{2} + {y}^{2}$

on adding all these we get

$= 2( {x}^{2} + {y}^{2} + {z}^{2} ) = 2(1) = 2$

hope this will help u