document.write( "Question 388621: 1. Express 3cos(x°)+5sin(x°) in the form kcos(x°-a°), where k>0 and 0≤a≤360\r
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Algebra.Com's Answer #275021 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Draw a right triangle with those coefficients as legs:\r\n" );
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document.write( "horizontal leg = 3 and vertical leg = 5\r\n" );
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document.write( "Calculate the hypotenuse using the Pythagorean theorem\r\n" );
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document.write( " so \r\n" );
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document.write( " so \r\n" );
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document.write( "Substitute  for 3 and\r\n" );
document.write( "substitute  for 5 in\r\n" );
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document.write( "factor out  on the left side:\r\n" );
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document.write( "Now we remember the formula , and the above can be written:\r\n" );
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document.write( "Since , the above becomes:\r\n" );
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document.write( "This is in the form  \r\n" );
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document.write( "where  and \r\n" );
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document.write( "So we have\r\n" );
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document.write( " =  = \r\n" );
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document.write( "Edwin

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