Trig is a bastard, it's worth knowing the complex exponential forms of sine and cosine as you can then avoid trying to remember the identities.ie.
sin(x)=1/(2i)(e^(ix)-e^(-ix))
and,
cos(x)=1/2(e^(ix)+e^(-ix)
where,
i=sqrt(-1) (you might know 'i' as 'j')
Other than that I can only tell you the trick to learning maths is do lots of problems,
until your sick of em...
and then do some more.
Good luck with your studies :D
(,
Thu 12 Dec 2013, 20:34,
archived)
sin(x)=1/(2i)(e^(ix)-e^(-ix))
and,
cos(x)=1/2(e^(ix)+e^(-ix)
where,
i=sqrt(-1) (you might know 'i' as 'j')
Other than that I can only tell you the trick to learning maths is do lots of problems,
until your sick of em...
and then do some more.
Good luck with your studies :D