InterviewSolution
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`y=tan^(-1)((3x-x^(3))/(1-3x^(2)))` का अवकलन x के सापेक्ष ज्ञात कीजिए, जबकि `-1/(sqrt3)ltxlt1/(sqrt3)` |
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Answer» माना `y=tan^(-1)((3x-x^(3))/(1-3x^(2)))` `x=tantheta` रखने पर, `y=tan^(-1)((3tantheta-tan^(3)theta)/(1-3tan^(2)theta))` `rArry=tan^(-1)(tan3theta)` (i) `-1/(sqrt3)ltxlt1/(sqrt3)` `rArr-1/(sqrt3)lttanthetalt1/(sqrt3)` `rArr-pi/6ltthetapi/6` `rArr-pi/2lt3thetaltpi/2` `thereforey=tan^(-1)(tan3theta)` `rArry=3theta` `rArry=3tan^(-1)x` `[becausex=tanthetarArrtheta=tan^(-1)x]` `therefore(dy)/(dx)=3/(1+x^(2))` |
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