document.write( "Question 70757: I need to find the solution for d. 300=50/sin(d/2) \n" ); document.write( "
Algebra.Com's Answer #50515 by bucky(2189)\"\" \"About 
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\"300=50%2Fsin%28d%2F2%29\" solve for d
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\n" ); document.write( "Replace d/2 by A for the time being to get:
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\n" ); document.write( "\"300=50%2Fsin%28A%29\"
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\n" ); document.write( "Multiply both sides by sin(A) to get:
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\n" ); document.write( "\"300%2Asin%28A%29+=+50%2Asin%28A%29%2Fsin%28A%29\"
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\n" ); document.write( "Replace the sin(A)/sin(A) by 1. As a result the equation is:
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\n" ); document.write( "\"300%2Asin%28A%29+=+50\"
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\n" ); document.write( "Divide both sides by 300 and get:
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\n" ); document.write( "\"sin%28A%29+=+50%2F300+=+1%2F6\"
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\n" ); document.write( "Now by taking the arcsin(A) = 1/6 on a calculator you find that A = 9.5941 degrees.
\n" ); document.write( "But before we had decided that \"A=d%2F2\". Therefore d = A*2. If we substitute 9.5941
\n" ); document.write( "degrees for A we get that d = 9.5941*2 = 19.0982 degrees.
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\n" ); document.write( "This is a principal solution. It can be converted to radians by multiplying 19.0982
\n" ); document.write( "degrees by \"pi%2F180\".
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\n" ); document.write( "Don't forget that sin(A) is also positive in the second quadrant. Therefore, the angle
\n" ); document.write( "170.4059 degrees is also a possible solution for A in sin(A) = 1/6. And since \"A+=+d%2F2\"
\n" ); document.write( "we can write 170.4059 degrees = d/2. Solving for d we get 340.8118 degrees.
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\n" ); document.write( "Again these answers in degrees can be converted to radians by multiplying by \"pi%2F180\".
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\n" ); document.write( "Hopefully this gives you a clue as to how to work this problem.
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