I need help to verify if this is correct and I can't find the mistake can you?
csc^2(2x)sin(x)tan(x)+2csc(x)cos(x)=sec(x)csc^2(2x )
I need to prove if there are any errors and if so identify them and explain why they are errors. If there are no errors explain why. I need help get gets to confusing to follow for me. thanks erin
Csc^2(2x)sin(x)tan(x)+2 csc(x)cos(x)=sec(x)csc^2(2x)
Csc(x)[csc(x)sin(x)tan(x)+2 cos(x)]=sec(x)csc^2(2x)
[csc(x)sin(x)tan(x)+ 2 cos(x)] sec(x)csc(2x)
csc(x)sin(x)(cos(x)/sin(x)) + 2 cos(x) =sec(x)csc(x)
cos(x)[csc(x+2)] = sec(x)csc(2x)
cos(x)csc(2x)=sec(x)csc(2x)
cos(x)=sec(x)
sec(x)cos(x) = 1
(1/cos(x))cos(x) = 1
1=1
I saw that and thought that maybe they were dividing the whole equation by 2 or squaring the problem but that didn't look right But I didn't know how to explain in words I knew it was wrong but don't know the right way to explain other than you can not do it. thanks for helping me. validate I knew the mistake. Erin
there are a lot of 's for which so you cannot just cancel it..
in fact, suppose, they are equal.
can also be written as or
then,
so, either or
cannot happen otherwise is undefined.
it means that should be true. hence for any integer .
this only means that is true only when for any integer ..