- #1
faust9
- 692
- 2
OK, I having a small problem understanding how my textbook came about an answer to an example problem.
[tex]f(x,y)=4-x^2-\frac{1}{4}y^2[/tex]
at P(1,2)
This next step is the one that's bugging me:
[tex]u^\rightarrow=\cos(\frac{\pi}{3})\imath+\sin(\frac{\pi}{3})\jmath[/tex]
This is one of those instances where something magic happens because right now I have little to no clue where the [tex]\frac{\pi}{3}[/tex] came from.
Thanks...
[tex]f(x,y)=4-x^2-\frac{1}{4}y^2[/tex]
at P(1,2)
This next step is the one that's bugging me:
[tex]u^\rightarrow=\cos(\frac{\pi}{3})\imath+\sin(\frac{\pi}{3})\jmath[/tex]
This is one of those instances where something magic happens because right now I have little to no clue where the [tex]\frac{\pi}{3}[/tex] came from.
Thanks...