1.

x के सापेक्ष `see (tan ^(-1)x ) ` का अवकल गुणांक ज्ञात कीजिए |

Answer» माना ` " "y= sec (tan ^(-1)x)`
माना ` tan ^(-1) x=t `
` therefore " y= sec t `
या ` (dy)/(dx) =(d)/(dt) sect (dt)/(dx) =sec t tan t(d)/(dx) (tan ^(-1)x )`
` " " =(sec (tan ^(-1) x) tan (tan ^(-1)x ))/(1+ x^(2))`
` " "=(x)/( 1+x ^(2))sec(tan ^(-1) x )`


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