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If y=cos^(-1)((2x)/(1+x^2)),t h e n(dy)/...

If `y=cos^(-1)((2x)/(1+x^2)),t h e n(dy)/(dx)i s` (a)`(-2)/(1+x^2)` for all `x` (b) `(-2)/(1+x^2)` for all `|x|<1` (c)`2/(1+x^2)` for `|x|>1` (d) none of these

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CENGAGE ENGLISH-LIMITS AND DERIVATIVES-All Questions
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