00:01
Okay, here's my ladder shown in red, length of 5 meters, and the angle with the ground you are told is 65 degrees.
00:08
Part a, i want to find how high up the wall the ladder is reaching.
00:14
So right triangle, i can use sign cost tan, and here to find y, i will use sign.
00:20
Sign of the angle is opposite over hypotenuse.
00:25
So opposite 65 is y, the longest side h is the 5.
00:30
So, y then, is 5 times sine 65 degrees.
00:36
So the calculator, make sure you're in degree mode.
00:40
5 times sign 65 is 4 .53...