Question 1154886
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Right angle triangle with the hypotenuse of 255 miles in the second quarter (starting from the origin of the coordinate system)


and the leg of 46 miles parallel to x-axis.


The angle  {{{alpha}}}  of heading is  {{{sin(alpha)}}} = {{{46/255}}} = 0.180392 with the y-axis.


Having clear instructions, you do the rest.
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I am not familiar with this aviation / pilot's terminology; therefore, I use the terms related to coordinate plane.