00:01
Okay, so this is a tangent subtraction formula.
00:03
How am i going to do the tangent subtraction formula? well, my two angles are pi over six, pi over four.
00:09
So it's tangent of the first angle.
00:12
Subtraction, i put subtraction in the numerator minus tangent of pi over six, my second angle, all over one opposite of subtraction plus tangent of pi over four times tangent of pi over six.
00:27
Okay.
00:28
So what is tangent of pi over four? well, this is the exact same as sign of pi over four and cosine of pi over four, but they're the exact same.
00:37
So this is just going to be one.
00:39
Okay.
00:40
And then what's tangent of pi over six? well, this is the same as sine of pi over six over six over five of six.
00:47
Pi over six, same thing as 30.
00:50
Sign is one half over cosine is square to three over two.
00:55
One half times the reciprocal.
00:58
This is the same as one, over the square root of three.
01:02
Okay, i'm just going to leave it like this...