00:01
The short answer to this problem, as long as i'm reading this correctly, is sine squared of x plus cosine square of x is always equal to one.
00:12
So just for clarification, that answer is one.
00:16
Doesn't matter what x is.
00:19
A visualization for that is because if you were to look on the unit circle and 70 degrees is about right here, and you think about how the unit.
00:32
Circle has a hypotenuse of one.
00:35
I have no idea what this side length is, but i'll call it y, because sine of 70 degrees will equal y over 1, or anything divided by 1 is just y.
00:51
Same thing with cosine of 70 degrees.
00:55
I just haven't written it down, but x over 1, because it's going to be the x coordinate is this way...
