- #1
mr_coffee
- 1,629
- 1
Hello everyone,i had a question..i have the following problem, I'm suppose to find the first partial derivatives:
f(x,y,z,t) = xyz^2*tan(yt);
I got all the partial derivaties right but the fy, they get:
fy = xyz^2*sec^2(yt);
when i do it, i get:
fy = xz^2*sec^2(yt)*t = txz^2*sec^2(yt);
Arn't u suppose to think x,z and t are all constants? if that's the case, when u use the chain rule inside the sec^2(yt), d/dt(yt) = t isn't it?
f(x,y,z,t) = xyz^2*tan(yt);
I got all the partial derivaties right but the fy, they get:
fy = xyz^2*sec^2(yt);
when i do it, i get:
fy = xz^2*sec^2(yt)*t = txz^2*sec^2(yt);
Arn't u suppose to think x,z and t are all constants? if that's the case, when u use the chain rule inside the sec^2(yt), d/dt(yt) = t isn't it?