just needed a clue on how to start the math behind this thanks!!
find a unit vector, if terminal point is at (4,4) on 4y=x^2, is normal to the curve and pointed towards the positive y-axis
Here are the steps to perform:
1. Determine the gradient m of the curve at P(4, 4).
2. Determine the orthogonal direction n of the gradient using
3. n can be written as a vector . Determine the length of and consequently
4. Calculate the unit vector of