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If y=1/2log((1-cos2x)/(1+cos2x)),p rov e...

If `y=1/2log((1-cos2x)/(1+cos2x)),p rov et h a t(dy)/(dx)=2cos e c2x`

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`y=1/2log((1-cos2x)/(1+cos2x))`
`1-cos2x=2sin^2x`
`1+cos2x=2cos^2x`
`y=1/2log(2sin^2x)/(2cos^2x)`
`=1/2log tan^2x`
`y=logtanx`
`dy/dx=1/(tanx)xxsec^2x`
`=(1/cos^2x)/(sinx/cosx)`
...
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RD SHARMA-DIFFERENTIATION-Solved Examples And Exercises
  1. If y=sqrt(x^2+a^2) ,prove that y(dy)/(dx)-x=0

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  2. If y=xsin^(-1)x+sqrt(1-x^2), p rov et h a t(dy)/(dx)=sin^(-1)x

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  3. If y=1/2log((1-cos2x)/(1+cos2x)),p rov et h a t(dy)/(dx)=2cos e c2x

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  4. If y=e^xcosx ,p rov et h a t(dy)/(dx)=sqrt(2)e^xcos(x+pi/4)

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  5. If y=(x-1)log(x-1)-(x+1)log(x+1),p rov et h a t(dy)/(dx)=log((x-1)/(1+...

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  6. If y=sqrt(x)+1/(sqrt(x)),p rov et h a t2x(dy)/(dx)=sqrt(x)-1/(sqrt(x))

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  7. P rov et h a t d/(dx){x/2sqrt(a^2-x^2)+(a^2)/2sin^(-1)x/a}=sqrt(a^2-x^...

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  8. If x y=4,p rov et h a tx((dy)/(dx)+y^2)=3y

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  9. Differentiate the following functions with respect to x : tan^(-1)s...

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  10. Differentiate the following functions with respect to x : tan^(-1)((...

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  11. Differentiate the following functions with respect to x : tan^(-1)((3...

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  12. Differentiate the following functions with respect to x : tan^(-1)(...

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  13. Differentiate the following functions with respect to x : tan^(-1){(1+...

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  14. Differentiate the following functions with respect to x : tan^(-1){s...

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  15. Differentiate the following functions with respect to x : tan^(-1){s...

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  16. Differentiate the following functions with respect to x : tan^(-1){(1+...

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  17. Differentiate the following functions with respect to x : tan^(-1){s...

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  18. Differentiate the following functions with respect to x : tan^(-1)(s...

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  19. Differentiate the following functions with respect to x : tan^(-1)((a...

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  20. Differentiate the following functions with respect to x : tan^(-1)((...

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