00:01
Okay, so we want to simplify this trig expression.
00:05
First thing i'm going to do is rewrite this expression in terms of signs and cosines.
00:13
So on top, i'm going to have 1 minus cosine because sicken is the reciprocal of cosine, minus cosine over 1, and that's going to be over tangent, which is sign over cosine.
00:27
I'm going to put the fractions together in my numerator, so that can.
00:31
Gives me 1 minus cosine squared over my denominator, sine over cosine.
00:40
1 minus cosine squared i can replace with sine squared.
00:47
And now i'm going to multiply by the reciprocal of my denominator cosine over sign.
00:54
My cosines cancel.
00:56
Sign cancels with one, and i'm left with my answer, which is just sine x.
01:05
Okay, there's a second...