document.write( "Question 1050637: Prove that 2SinxCosx=Sin2x \n" ); document.write( "

Algebra.Com's Answer #666214 by rothauserc(4718) $\"\"$ $\"About$

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Prove that 2SinxCosx = Sin2x
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\n" ); document.write( "We use the identity sin(A+B) = sinAcosB + cosAsinB
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\n" ); document.write( "Sin(2x) = Sin(x+x)
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\n" ); document.write( "Sin(x+x) = Sin(x)Cos(x) + Cos(x)Sin(x), therefore
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\n" ); document.write( "Sin(2x) = 2Sin(x)Cos(x)
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