Sin (x -) has no meaning. But If by sin (x - ), you mean sin(–x),
Then sin x = -sin x => sin x = 0 => x = 0, π, 2π.
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Sin (x -) has no meaning. But If by sin (x - ), you mean sin(–x),
Then sin x = -sin x => sin x = 0 => x = 0, π, 2π.