Differentiate.
y= u(a cos u + b cot u)
I am not sure if this correct. I was not sure whether to leave the variables as are or where the negatives should be placed?
(u)*(- a sin u - b csc^2 u) + (a cos u + b cot u)*(1)
2 answers
well, ok, if you are taking the diff with respect to u. I am not certain the author had that in mind.
How else would you go about it?