00:01
So we are going to...
00:04
So the first thing we want to do for a, we write ff x equals negative x, i mean at negative f times a sine of theta times a cosine of 20 degrees.
00:27
We then, to the f which is negative 3 ,900 pounds.
00:34
Pounds, pounds, times times going to be sine of 30 .51 degrees times the cosine of 20 degrees.
00:53
And that's going to be fx is going to equal negative 1861, 1 ,161.
01:10
Pounds.
01:14
Now we're going to take that number and we're actually going to keep this number on the side.
01:23
Then we're going to do f y is going to equal positive f cosine of theta, which is 3 ,000 times, about 3 ,900 times 0 .86 .6.
01:44
154 which is 3 ,360 pounds...