document.write( "Question 1194430: Two students ride on an helicopter to measure the
\n" ); document.write( "width of a lake. At a point 760 m above the lake, they are
\n" ); document.write( "able to measure using a lensatic sighting compass the angle of
\n" ); document.write( "depression on one side of the lake as 45° and the angle of
\n" ); document.write( "depression on the other side is 20°. What is the width of the lake?
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Algebra.Com's Answer #826632 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "Two students ride on an helicopter to measure the
\n" ); document.write( "width of a lake. At a point 760 m above the lake, they are
\n" ); document.write( "able to measure using a lensatic sighting compass the angle of
\n" ); document.write( "depression on one side of the lake as 45° and the angle of
\n" ); document.write( "depression on the other side is 20°. What is the width of the lake?
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document.write( "If the two observation points at the lake shore are on the different (opposite) sides from the helicopter,\r\n" );
document.write( "then the lake width is\r\n" );
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document.write( "     W = \"760%2Ftan%2820%5Eo%29\" + \"760%2Ftan%2845%5Eo%29\" = \"760%2F0.364+%2B+760%2F1\" = 2848 m  (rounded).    \r\n" );
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document.write( "If the two observation points at the lake shore are on the same side from the helicopter,\r\n" );
document.write( "then the lake width is\r\n" );
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document.write( "     W = \"760%2Ftan%2820%5Eo%29\" - \"760%2Ftan%2845%5Eo%29\" = \"760%2F0.364+-+760%2F1\" = 1328 m  (rounded).    \r\n" );
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