Multiple-Angle Formulas -- from Wolfram MathWorld
If n is even, you can write : ,
Does it help you ?
Haha I just realised that its exam season, have you guys been getting a lot more questions?
In some notes that I found on the my schools site there is a rule of sorts to working out what to do when integrating trig.
[sin(x)]^n . dx
It then says that if n is even "change to mulitple angles" What does it mean by multiple angles?
I don't know, thanks for that site though it sort of related more to turning multiple angles into ones like (sin x)^n plus other assorted things. More like trig identities.
This kind of makes it hard to reverse and I don't want to make it harder for myself when intergrating.
Any other ideas?