If you draw a diagram, you can see that to get (a) you use the law of cosines. The distance is
√(100^2 + 80^2 - 2*100*80 cos160°) = 177.3 km
As for the bearing,
100cis55° + 80cis235° = 179.9 cis(-124.997°)
That is very close to 180 @ 215°
from point o in the school compound, Adeola is 100m away on a bearing oh N35E and Ibrahim is 80m away on a bearing of S55w
a-how far apart are both boys
b-what is the bearing of Ibrahim from Adeola in three figures bearings?
3 answers
What is the full name of cis
100^2+80^2-2*100*80*cos160