Images 2 COS 3П B SIN

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2 cos 3п b sin. Sin 3п/2. Sin(2х+п/2)=. Sin^2 п/4. 3cos п-b sin п/2+b.
Sin 3п/2. Sin(2х+п/2)=. Sin^2 п/4. 3cos п-b sin п/2+b.

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