document.write( "Question 1150839: Apply the law of sines or the law of cosines and diagram and label the appropriate parts of the triangles. \r
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Algebra.Com's Answer #772362 by MathTherapy(10555)\"\" \"About 
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Apply the law of sines or the law of cosines and diagram and label the appropriate parts of the triangles. \r
\n" ); document.write( "\n" ); document.write( "An airplane sights an airport runway at an angle of depression at 47 degrees. After the plane flies 4 miles closer the angle of depression from the plane to the runway is 62 degrees. What is the air distance from the plane to the end of the runway at the second sighting?
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My understanding is that the problem is asking for the distance from the plane's height with a 62o angle of depression to runway, which, when using
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document.write( "MATHLOVER1's diagram, is side BD, or the hypotenuse of triangle BDC. And, side BD can be found by using the law of sines (as requested), as follows:  
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document.write( "\"matrix%281%2C3%2C+BD+%2A+sin+%2815%5Eo%29%2C+%22=%22%2C+4+%2A+sin+%2847%5Eo%29%29\" ------- Cross-multiplying
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document.write( "Distance from the plane's height with a 62o angle of depression to runway, or 
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document.write( "FYI: When finding \"h\" in MATHLOVER1's diagram, and as she tried to, the ratio is NOT: \"matrix%281%2C3%2C+tan%2847%5Eo%29%2C+%22=%22%2C+h%2F4%29\", but should either be: !! \n" );
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