General Solutions to sinx and cosx (1 Viewer)

[Bdogz]

It may seem an easy area but can any1 explain how u derive the equations of them please

 

[cutemouse]

You don't need to know how to derive them. Although it's quite obvious in my opinion. Just look at the graphs of these functions.



Where n is any integer.

 

[tom.evans.15]

You don't really need to derive them, but try choosing a set of integers (say 0,1,2) to use as n and sub it in, it gives you an idea of how the whole thing works.

ie. when sinx=siny, x=n(pi)+((-1)^n)y

for n=0, x=y (first quadrant)
for n=1, x=pi-y (second quadrant)
for n=2, x=2pi-y (third quadrant)
and so on...

sorry if this is bleedingly obvious, i just found it helped when I was having trouble with general sol'ns