A ship sets out to sail to a point 210 km due north. An unexpected storm blows the ship to a point 110 km due east of its starting point. In what direction must it now sail to reach its original destination? ____________º (counterclockwise from east)
2007-09-18 05:23:46 · 2 answers · asked by sydkannon 1 in Science & Mathematics ➔ Physics
Finally after trying and trying I got the answer. It's 117.65 º
Thanks anyways. =)
2007-09-18 06:18:35 · update #1
assume north is y then
(0,210)-(110,0)= (-110,210) is new vector to destination
To get cos of angle use formula for dot product
since you are dealing with a right triangle this is not the easy way but it works for all cases.
2007-09-18 06:24:32 · answer #1 · answered by meg 7 · 0⤊ 0⤋
http://answers.yahoo.com/question/index;_ylt=Ag0_zkvSIbZYB4ivUL3hYyEjzKIX;_ylv=3?qid=20070905112850AA26U5G
sounds like trig
arctan (210/110) = 62 degrees
draw it. I did. looks right
2007-09-18 05:32:05 · answer #2 · answered by 4 · 0⤊ 0⤋