Show that i-cap x (a x i-cap) + j-cap x (a x j-cap) + k-cap x (a x k-cap) =2a

[Dhanalakshmi]

For any vector a, show that i-cap x (a x i-cap) + j-cap x (a x j-cap) + k-cap x (a x k-cap) =2a.

[Dhanalakshmi]