- #1
wanchosen
- 19
- 0
Hi there, I am struggling with trigonometrical identities and how to use them effectively. I can work out simpler problems but I can't seem to get my head round slightly bigger ones like this:-
Simplify:-
sin^4(x) + 2sin^2(x)cos^2(x) + cos^4(x)
I 've tried substituting "2sin^2(x)cos^2(x)" with
sin^2(x) = 1 - cos^2(x)
and also tried
cos^2(x) = 1 - sin^2(x)
but end up going round in circles. Can somebody give me some pointers please!
Thanks!
Simplify:-
sin^4(x) + 2sin^2(x)cos^2(x) + cos^4(x)
I 've tried substituting "2sin^2(x)cos^2(x)" with
sin^2(x) = 1 - cos^2(x)
and also tried
cos^2(x) = 1 - sin^2(x)
but end up going round in circles. Can somebody give me some pointers please!
Thanks!