document.write( "Question 667117: Use an Addition or Subtraction Formula to find the exact value of the expression.
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Algebra.Com's Answer #853711 by MathTherapy(10719) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Use an Addition or Subtraction Formula to find the exact value of the expression.\r\n" );
document.write( "sin( -5π/12)\r\n" );
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document.write( "@Lynnlo's answer: 0.9659======OR===========-1+√3/2√2, is ALL WRONG!\r\n" );
document.write( "Isn't the EXACT value needed? .9659 is certainly NOT THAT!! And, I have no idea what \"-1+√3/2√2\" is!!\r\n" );
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document.write( "You can use either, sin (A - B) = sin A cos B - cos A sin B (DIFFERENCE-of-2 ANGLES formula), or \r\n" );
document.write( "                    sin (A + B) = sin A cos B + cos A sin B (SUM-of-2 ANGLES formula)\r\n" );
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document.write( "Using sin (A - B) = sin A cos B - cos A sin B (DIFFERENCE-of-2 ANGLES formula)\r\n" );
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document.write( " =  = \r\n" );
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document.write( "  sin (A - B) = sin A cos B - cos A sin B\r\n" );
document.write( ", with  \r\n" );
document.write( " =  = \r\n" );
document.write( "=======================================================================================\r\n" );
document.write( "Using sin (A + B) = sin A cos B + cos A sin B (SUM-of-2 ANGLES formula)\r\n" );
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document.write( " =  = \r\n" );
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document.write( "     sin (A + B) = sin A cos B + cos A sin B\r\n" );
document.write( ", with  \r\n" );
document.write( " =  =

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