|sin (x+ pi/3)| = cos (x- pi/3) sin (x+ pi/3) = cos (x- pi/3) sin (x+ pi/3) =- cos (x- pi/3) thats how far i understand cos( pi/2- (x+ pi/3)) = cos (x- pi/3)
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I think your question is not very clear...can you please clarify what's the question?
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