Algebra.Com's Answer #160963 by Edwin McCravy(20060)![\"\"](\"/images/stars/stars-13.gif\")  
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write an equation of the sine function with amplitude 3,period 3pi/2, and phase shift pi/4\r
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document.write( "a)y=3sin(3x/2 - pi/4)
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document.write( "b)y=-3sin(4x/3 - pi/4)
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document.write( "c)y=-3sin(3x/2 - 3pi/8)
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document.write( "d)y=3sin(4x/3 - pi/3)\r
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document.write( " , with B and C positive.\r\n" );
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document.write( "has amplitude  , period  , and phase shift  ,\r\n" );
document.write( "The shift is right if  is positive and left if \r\n" );
document.write( "is negative.\r\n" );
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document.write( "We'll test each possible answer:\r\n" );
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document.write( "a) \r\n" );
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document.write( "has amplitude  , \r\n" );
document.write( "period  \r\n" );
document.write( "and phase shift  .\r\n" );
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document.write( "b) \r\n" );
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document.write( "has amplitude  , \r\n" );
document.write( "period  \r\n" );
document.write( "and phase shift  .\r\n" );
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document.write( "c) \r\n" );
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document.write( "has amplitude , \r\n" );
document.write( "period  \r\n" );
document.write( "and phase shift  .\r\n" );
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document.write( "d) \r\n" );
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document.write( "has amplitude , \r\n" );
document.write( "period \r\n" );
document.write( "and phase shift  \r\n" );
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document.write( "So (d) is the only correct choice.\r\n" );
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document.write( "Edwin \n" );
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