Find Exact Value of Trigonometric Expression...3

[nycmathguy]

Section 5.4

I need the formula for the following:

csc(u - v)

sec(v - u)...Why did the author exchanged places between v and u. In other words, why not
sec(u - v)? See the difference?

I also need the formula for cot(u + v).

I need the formulas for all the above to do

 

[MathLover1]

42. it should be -36/85

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[nycmathguy]

42. it should be -36/85

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Ok. I did not forget the sign. I made an error along the way. I will give myself credit, though. So, take away 2 points and give me 3 points for effort. I will do 44 and 46 tomorrow, Lord willing.