- #1
irony of truth
- 90
- 0
I am trying to find the ▲cos x. By using its definition.
It simply turned out to be cos(x+1) - cos(x). How do I express this in
terms of sine? (and as only one term)?
It simply turned out to be cos(x+1) - cos(x). How do I express this in
terms of sine? (and as only one term)?