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If x=a(cos theta+log tan(theta/2)) and y...

If `x=a(cos theta+log tan(theta/2))` and `y=a sin theta` then find `(dy)/(dx)` at `theta=pi/3` and `theta=pi/4`

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The correct Answer is:
`(sec^(2) theta.tan^(2) theta)/(a sin theta)`
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OSWAAL PUBLICATION-CONTINUITY AND DIFFERENTIABILITY-DIFFERENTIABILITY ( LONG ANSWER TYPE QUESTIONS-I)
  1. If x=a(cos theta+log tan(theta/2)) and y=a sin theta then find (dy)/(d...

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  2. If y=A e^(m x)+B e^(n x) , show that (d^2y)/(dx^2)-(m+n)(dy)/(dx)+m n ...

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  3. If y=3\ e^(2x)+2\ e^(3x) , prove that (d^2y)/(dx^2)-5(dy)/(dx)+6y=0 .

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  4. If y = 3 cos (log x) + 4 sin (log x), show that x^2y2+xy1+y=0

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  5. If y=(t a n^(-1)\ x^2) , show that (x^2+1)^2(d^2\ y)/(dx^2)+2x(x^2+1)(...

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  6. If x=a(cost+tsint) and y=a(sint-tcost) , then find the value of (d^...

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  7. If (x-y)ex/(x-y)=a , prove that (dy)/(dx)+x=2ydot

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  8. If x=a(cost+logtant/2) , y=asint , evaluate (d^2y)/(dx^2) at t=pi/3 .

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  9. If y=tan^(-1)(a/x)+logsqrt((x-a)/(x+a)) , Prove that (dy)/(dx)=(2a^3)/...

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  10. If (tan^(-1)x)^(y)+y^(cotx)=1, then find (dy)/(dx).

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  11. Differentiate tan^(-1)((sqrt(1-x^2))/x) with respect to cos^(-1)(2xsqr...

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  12. Differentiate tan^(-1)(x/(sqrt(1-x^2))) with respect to sin^(-1...

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  13. Differentiate tan^(-1)((sqrt(1+x^2)-1)/x) with respect to sin^(-...

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  14. If y=x^x , prove that (d^2y)/(dx^2)-1/y((dy)/(dx))^2-y/x=0

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  15. Find the value of (dy)/(dx) at theta= pi/4, if x=ae^theta(sintheta-c...

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  16. If x=asin2t(1+cos2t) and y=bcos2t(1-cos2t), show that at pi/4,(dy)/...

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  17. If x=cost(3-2\ cos^2t) and y=sint(3-2s in^2t) find the value of (dy)/(...

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  18. If y=A e^(m x)+B e^(n x) , show that (d^2y)/(dx^2)-(m+n)(dy)/(dx)+m n ...

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  19. If x = a cos theta + b sin theta and y =asin theta-b cos theta, then p...

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  20. If x^my^n=(x+y)^(m+n) prove that (dy)/(dx)=y/x

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