<p>A plane flies 810 miles from A to B with a bearing of N75E. Then it flies 648 miles from B to C with a bearing of N32E. Draw a diagram to represent the problem and find the straight-line distance.</p>
<p>I keep getting:</p>
<p>b^2=648^2+810^2-(648<em>810</em>cos137)
b= 1208.25 mi.</p>
<p>the book however gives an answer of 1357.8 mi</p>
<p>am i wrong, or is the book wrong? please correct me if i am wrong! </p>
<p>Thx</p>