i have no idea! at all how to do it. plz help
1) Cos X/Sec X - 1 - Cos X/tan^2 X = Cot^2 X
2) Sin X / 1 - Cos X + 1 - Cos X / Sin X = 2CSC X
Now if you don't know thatthen you should learn it. (If you can't see where it comes from, just divide both sides of by .)
Well, that means that:Can you see that this means that we can factorise the original expression? Like this:...(1), using (1)Grandad
, using (1) again.