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" If "y=e^(-x)cos x," show that "(d^(2)y...

" If "y=e^(-x)cos x," show that "(d^(2)y)/(dx^(2))=2e^(-x)sin x

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If y=e^(-x)cos x, show that (d^(2)y)/(dx^(2))=2e^(-1)sin x

If y=e^(-x)cosx, show that (d^(2)y)/(dx^(2))=2e^(-x)sinx.

If y=e^(-x)cosx, show that (d^(2)y)/(dx^(2))=2e^(-x)sinx.

If y=e^-x cos x , show that (d^2y)/(dx^2)= 2e^-x sin x

If y=2sin x+3cos x, show that (d^(2)y)/(dx^(2))+y=0

If y=2sin x+3cos x, show that (d^(2)y)/(dx^(2))+y=0

If y=e^(x)cos x, prove that t(d^(2)y)/(dx^(2))=2e^(x)cos(x+(pi)/(2))

If y=e^(x)cos x, prove that (d^(2)y)/(dx^(2))=2e^(x)cos(x+(pi)/(2))

If y=2 sin x+3cos x , show that (d^2y)/(dx^2)+y=0

If y=e^(7x) +e^(-7x) , show that (d^(2)y)/(dx^(2))= 49y .