00:01
So here we have our telephone line that has a function for the height equal to, let's see here.
00:20
Y is equal to 15.
00:23
Kosh x over 15 minus 10.
00:28
Here is zero.
00:29
Here is negative 7.
00:30
Here is 7.
00:32
Want to know the slope then here at the right pole.
00:37
Well, the slope there is going to be d, y, d, x, which is going to be 15 times the shine of x times 115th.
00:59
So that is just the shine of x over 15 and we want to evaluate now at the right pole which is where x is seven so that means then that we get the slope is equal to the shine of seven over 15 which is equal to 0 .4838 and so that is the slope of this blue line.
01:47
And this is my angle theta, and i want to know what theta is.
01:54
Well, if that slope is 0 .487, then the angle, let's see, let's draw a triangle then...