lianaperez914 lianaperez914

01-04-2022
Mathematics

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4sin(-x)cos(-x)= -2sin2x
true or false

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loneguy loneguy

01-04-2022

[tex]\text{L.H.S}\\\\=4\sin(-x) \cos(-x)\\\\=-4\sin x \cos x\\\\=-2 \cdot 2 \sin x \cos x\\\\=-2 \sin 2x\\\\=\text{R.H.S}\\\\\text{The identity is true.}[/tex]

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