If y=sin 7 cotx,then dy/dx
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patanahing kounsa nasa karta hee
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y=(cot x) -------------(cot x) 1
dy/dx=d/dx son (cot x)
dy/dx= cos (cot x)
dy/dx=cos(cot x) [-cosec²x)
dy/dx=cos ( cot x) cosec² x
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