3 Answers
Lokesh Verma
·2008-11-06 07:56:40
f(x+a)=f(x)
only means that a factor of a will be the period!
it does not mean that a is a period.. (it could be but it is not necessary!)
Lokesh Verma
·2008-11-06 09:25:01
sin4x+cos4x = (sin2x+cos2x)2 - 2sin2x.cos2x
= 1-2sin2x.cos2x
= 1- sin2(2x)/2
this will have same period as sin22x
sin22x find it...
i guess u will get it now :)