now ... what do you know about the sum ?
note that and that
I am not understanding at all how to do the trigonometric identities...
As far as i know we had 12 of them that we had to memorize, even after memorizing them i am unsure of how to apply them.
so for my first question the problem says
(sinx + cosx)(sinx + cosx) -1 / sinxcosx
multiply and simplify
the answer is 2 however im unsure how you get that answer.
also there is
1 + tan^2(-x) = sec^2(x)
how do I get both sides to equal the same im suppose to use the more complicated side, but, which identity do I use?
If there is any easy way to remember the identities and to apply them that would be great..
thanks in advance
sin^2x+cos^2x = 1, so
1 + 2 -1 = 2 oo.....
ok and then
1 + tan x^2
1 + tan x^2 = sec x^2
ok I understand it when someone tells me what to do, but i cant think of what to use when i have to do it all alone :S
so i have 2 more problems
tanx + cosx /1+sinx = secx
sinx/cosx + cosx/1+sinx = secx
is that correct? where do i go after that? :/
sinx/sinx - cosx = 1 /1 - cotx
is there any way of really knowing what you have to use? still confused alot thank you