I have been asked to find cot(43π). However, I'm not sure how to work this out. I have been given the formulae cotx=(sinxcosx) and cotx=(tanx1). My teacher said that the latter is not always true, if that's any help. So what I did was: sin(4)cos(3π), and put that into my calculator (in radians mode), but it gave me 1.32, which is wrong as the answer is -1.
Where am I going wrong here? Any help is appreciated!
I have been asked to find cot(43π). However, I'm not sure how to work this out. I have been given the formulae cotx=(sinxcosx) and cotx=(tanx1). My teacher said that the latter is not always true, if that's any help. So what I did was: sin(4)cos(3π), and put that into my calculator (in radians mode), but it gave me 1.32, which is wrong as the answer is -1.
Where am I going wrong here? Any help is appreciated!
Your teacher is wrong for a start, the definition of cot(x) is 1/tan(x). Basically if you re-write your question as 1/tan(3PI/4), which if you do on a calculator would give 1/(-1) which will give you the answer of -1.