Prove that `('sin ' 5x -2 'sin ' 3x + ' sin 'x)/(' cos ' 5x - ' cos ' x) = ' cosec ' 2x -'cot

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Prove that `("sin " 5x -2 "sin " 3x + " sin "x)/(" cos " 5x - " cos " x) = " cosec " 2x -"cot " 2x`
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