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यदि `x= a cos theta , y= a sintheta ` तब ` (dy)/(dx)` का मान ज्ञात कीजिए|

Answer» दिया है-` " "x= a cos theta , y=asin theta `
` rArr" "(dx)/(d theta )=-asin theta ,(dy)/(d theta )= a cos theta `
`therefore " "(dy)/(dx) =(dy//d theta )/(dx//d theta )=(acos theta )/(-asin theta )=-cot theta `


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