Take the right angled triangle with sides 13, 12 and 5. sine theta will be 12/13
When sin theta < 0 and cos theta < 0 we are in the third quadrant so sin theta will be -12/13
tan theta = sin theta / cos theta = -5/13 / -12/13 = -5*13 / -12*13 = 5/12
2 cubic yards turns into 52 cubic feet.
Hope this helps.
Yes it is 11/15
1/3= 5/15
2/5= 6/15
5/15 + 6/15= 11/15