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A simple math problem. I need help.

V

VTboy

Banned
Another math problem. I hope some of you can do this one.

Find the orthogonal trajectories of y=ln(tanx+c)

this is what i did. e^y=tanx+c, e^y(dy/dx)=(secx)^2

(dy/dx)=((secx)^2)/e^y, Now set (dy/dx)=-(e^y)[(cosx)^2]

so (-e^-y)dy=[(cosx)^2]dx

answer is

e^-y=(sinxcosx+x)/2 + K

Did i do it right.
 
REPOST!!!!!111111eleven..... 😛 man, any more math problems and the MODs will have to sticky it, naming the thread "the eternal math problem thread" and make you Paypal for answer.
 
Doesn't your school have a Math Lab type place you can go for math help? I don't mind helping, if I can do it in my head or very quickly by hand without thinking, as in not Diffy Q. 😉
 
OMG.. how many math help questions are you going to post?! We aren't your farking homework check buddy... Yes, I took Diff EQ, it kicked my arse, but I can do those problems. Stop asking for homework answers already.
 
Originally posted by: Einz
OMG.. how many math help questions are you going to post?! We aren't your farking homework check buddy... Yes, I took Diff EQ, it kicked my arse, but I can do those problems. Stop asking for homework answers already.
Click to expand...

this is like the 5th post by you ive read today that relate to homework questions. and that 5 doesnt even count the "i like to eat dog" thread.
 
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