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If y=2sinx+3cosx , show that (d^2y)/(dx^...

If `y=2sinx+3cosx` , show that `(d^2y)/(dx^2)+y=0` .

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`y=2 \sin x+3 \cos x-(1) `
`\frac{d y}{d x}=2 \cos x-3 \sin x `
`\frac{d^{2} y}{d x^{2}}=-2 \sin x-3 \cos x `
...
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RD SHARMA-HIGHER ORDER DERIVATIVES-Solved Examples And Exercises
  1. If y=x^3logx , prove that (d^4y)/(dx^4)=6/x .

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  2. If y=log(sinx) , prove that (d^3y)/(dx^3)=2cosx cos e c^3x .

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  3. If y=2sinx+3cosx , show that (d^2y)/(dx^2)+y=0 .

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  4. If y=(logx)/x , show that (d^2y)/(dx^2)=(2logx-3)/(x^3) .

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  5. If x=asectheta , y=btantheta , prove that (d^2y)/(dx^2)=-(b^4)/(a^2\ y...

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  6. If x=a(costheta+thetasintheta) , y=a(sintheta-thetacostheta) , prove t...

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  7. If y=e^xcosx , prove that (d^2y)/(dx^2)=2\ e^xcos(x+pi/2) .

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  8. If x=acostheta , y=bsintheta , show that (d^2y)/(dx^2)=-(b^4)/(a^2y^3)...

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  9. If x=a(1-cos^3theta) , y=a\ s in^3theta , prove that (d^2y)/(dx^2)=(32...

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  10. If x=a(theta+sintheta) , y=a(1+costheta) , prove that (d^2y)/(dx^2)=-a...

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  11. If x=a(theta-sintheta) , y=a(1+costheta) find (d^2y)/(dx^2)

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  12. If x=a(1-costheta) , y=a(theta+sintheta) , prove that (d^2y)/(dx^2)=-1...

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  13. If x=a(1+costheta) , y=a(theta+sintheta) , prove that (d^2y)/(dx^2)=(-...

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  14. If x=costheta , y=sin^3theta , prove that y\ (d^2y)/(dx^2)+((dy)/(dx))...

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  15. If y=sin(sinx) , prove that (d^2y)/(dx^2)+tanxdot(dy)/(dx)+y\ cos^2x=0...

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  16. If x=sint ,y=sinp t ,"p r o v et h a t" (1-x^2)(d^2y)/(dx^2)-x(dy)/...

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  17. If y=(sin^(-1)x)^2 , prove that (1-x^2)y2-x y1-2=0 .

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  18. If y=e^tan^((-1)x) , prove that (1+x^2)y2+(2x-1)y1=0 .

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  19. If y=3cos(logx)+4sin(logx),\ prove that x^2y2+x\ y1+y=0 .

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  20. If y=e^(2x)(a x+b) , show that y2-4\ y1+4\ y=0 .

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