My book lacks answers and i suffer much confusion in this. So here goes, but first quick question. How do i produce signs like pi or theta on here like some of the experts do, along with representing fractions as a fraction as opposed to for example 2x/4
I misspelled Identities also in title im aware of this :P
tan x csc x cos x =1
tan=sin x/cos x
csc x= ? says something like csc(-x)=-csc x
cos x= 1/sec x
so i get
(sin x/cos x)(csc x)(1/sec x)=1 and am stuck here, the csc identity confuses me
To type symbols and fractions and other notations, learn Latex
ok what about (4sin^2 x-1)/(2sin x+1)=2sin x-1
would it be
(2sin x-1)/(x+1) =2sin x-1
this is where i get lost again as im not sure how to work the problem. seems like i could cancel out the 2sin x-1 from each side but it seems illegal
First, I'm not sure where you got the x + 1 in the denominator.
Originally Posted by Kromletch
Typically you want to work on only one side of the (suspected) identity. In this case
Note that the numerator is in the form . Can you take it from here?
Lets see. ( 2sin(x)-1)(2sin(x)+1)
then i can cancel out 2sin(x)+1 which leaves 2sin(x)-1=2sin(x)-1
which equals 1.
And that is the idea of an identity ?
Hmm im starting to understand, ive ran into yet again another different situation.
and am again unsure of where to go from here, im looking in my book at pyhagrean identities seems similar