What is the formula of sin 3x?
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A trigonometric identity for sin(3x) is sin(3x)=sin(x)(4cos2(x)−1) ( 3 x ) = sin ( x ) ( 4 cos 2 .
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the prupose of this page is to prove the following formula: \sin 3x = 4 \sinx\sin(60^{\circ}-x)\sin (60^{\circ}+x
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