Photos 2 SIN Α COS Α

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2 sin α cos α. Sinα - sinβ = 2cos((α + β)/2) · sin((α - β)/2). 2cos 2 α β cos 2 α β. Sin (α ± β ) =. Sin( α- β) равен.
Sinα - sinβ = 2cos((α + β)/2) · sin((α - β)/2). 2cos 2 α β cos 2 α β. Sin (α ± β ) =. Sin( α- β) равен.

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