i don't understand how 4 sin x cos x can be simplified into 2 sin 4x....can anyone show me the process?
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Originally Posted by alessandromangione i don't understand how 4 sin x cos x can be simplified into 2 sin 4x....can anyone show me the process? $\displaystyle 4\sin x \cos x=2\left ( 2\sin x\cos x \right )=2\sin2x$.
oh thanks...it was so easy haha
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