If and does not exist.
If then is continuous at and so is simply
I have a problem, that i simply cannot get the right answer for. I have tried using the principles of Double-Angle Formulas and Sum and Difference Formulas but i am not sure if i am doing it correctly. I was hoping someone could walk me through this so that i know what to do and will be able to repeat this for other questions of this type
lim x-->a