00:02
All right, we've got a plane that takes off, travels in a straight line for 4 ,000 feet to gain 800 feet in altitude.
00:11
So what that means is after liftoff, it starts going up.
00:15
And it goes up for 4 ,000 feet.
00:19
All right.
00:19
So this length here would be 4 ,000 feet.
00:22
And it does that to gain 800 feet.
00:26
So this angle is certainly not going to be drawn to scale here, but that's okay.
00:28
So that we get 800 feet of altitude.
00:32
And we want to know what is that angle of elevation at what angle does it have to go up at so that it gains 800 feet in height over 4 ,000 feet of distance.
00:43
All right.
00:44
So this looks to me like we're going to be using a sign function.
00:48
This looks like we have the opposite side and the hypotenuse.
00:51
So we know that the sign of theta is equal to the opposite divided by the hypotenuse.
00:58
All right, make sure careful with the zeros there...