document.write( "Question 1031139: Please Find the general solution of:
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Algebra.Com's Answer #645861 by ikleyn(52803) $\"\"$ $\"About$

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\n" ); document.write( "Please Find the general solution of:
\n" ); document.write( "sin(3x) - sin(x)= cos(2x)
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document.write( "Apply the formula   =   to the left side.\r\n" );
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document.write( "  (Regarding this formula, see the lesson Addition and subtraction of trigonometric functions in this site).\r\n" );
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document.write( "You will get an equivalent equation\r\n" );
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document.write( " = .\r\n" );
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document.write( "Simplify it further:\r\n" );
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document.write( " = .\r\n" );
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document.write( "Then you have two equations:\r\n" );
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document.write( "(1)  cos(2x) = 0  --->  2x =   --->  x = , k = 0, +/-1, +/-2, . . . ,   \r\n" );
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document.write( "and\r\n" );
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document.write( "(2)  2*sin(x) = 1  --->  sin(x) =   --->  x =   and  x = , k = 0, +/-1, +/-2, . . . .\r\n" );
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document.write( "The union of the sets (1) and (2) is your solution.\r\n" );
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