Trig Identities Help...Arrrggghhh!!! :) I typed all of this out but the system then said I was not logged in and I lost it all....don't have time to retype everything. note: the ^ symbol is like "squared" for example, if I have 4^2 , that would be "four squared" or 4 times 4 = 16 Anyways, I have like 25 homework problems and have 10 to finish and they are the difficult ones ones...really HARD! So, here are three of the ones that are really stumping me today! 1. cos^3 X-cos X = - cos X sin X ----------------- sin X 2. 1 ------------- = sin X cos X tan X + cot X and last but not least... 3. cot^2 X = (cot^2 X+1)(cos^2 X) Hoping some of you can help shine some light on these trig identities. Here is another trig identity I just figured out I think :)... 1 ------------ = sin X cos X tan X + cot x I worked on LEFT side and cross multiplied, then used pythagorean identity, then multiplied by reciprical... 1/ (sin X/cos X) + (cos X/sin X) 1/ (sin^2 X + cos^2 X)/cos X sin X 1/ 1/cos X sin X 1 times (sin X cos X)/1 =sin X cos X Hope I did that one right!! But those other trig identities above...wow...they are really HARD!!! they are kicking my rear today, but I am determined to beat them...lol...with some help, please?? Thanks a bunch!!