Find two vectors in opposite directions that are orthogonal to the vector u. (The answers are not unique. Enter your answer as a comma-separated list of vectors.) u = <6, ?3, 7>
2.Find the area of the triangle with the given vertices.
Hint: 1/2 is the area of the triangle having u and v as adjacent ||u ? v|| as adjacent sides
A(6, ?7, 8), B(0, 1, 2), C(?1, 2, 0
)