00:01
So i'm going to start with the right hand side because it looks a little bit more complicated.
00:07
So we have cosine x over 1 minus sign x.
00:18
I'm going to work sideways because i don't want to run out of space.
00:21
So first thing i want to do is since i see a negative right here, i want to multiply by the 1 plus sine x over 1 plus sine x.
00:37
To get rid of that.
00:40
So you'll have cosine x times one plus sine x all over.
00:50
And when you foil this, you'll have one minus sine squared x.
01:03
So now i'm going to distribute my cosine x in the numerator.
01:06
So you have cosine x plus sine x, cosine x, all over one minus sine x, sine squared x.
01:20
So if you take a look at the denominator, you see it looks a little bit familiar.
01:25
So it relates to one of our pythagony and identities.
01:29
So we originally have 1 equals sine squared x plus cosine squared x.
01:43
But if you subtract sine squared x from both sides, you'll have one minus sine squared x...