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" 19.If "cos^(-1)((x^(2)-y^(2))/(x^(2)+y...

" 19.If "cos^(-1)((x^(2)-y^(2))/(x^(2)+y^(2)))=tan^(-1)a," show that "(dy)/(dx)=(y)/(x)

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If cos^(-1)((x^(2)-y^(2))/(x^(2)+y^(2)))=tan^(-1)a, prove that (dy)/(dx)=(y)/(x)

If cos^(-1)((x^(2)-y^(2))/(x^(2)+y^(2)))=tan^(-1)a, prove that (dy)/(dx)=(y)/(x)

If cos^(-1)((x^(2)-y^(2))/(x^(2)+y^(2)))=tan^(-1)a , prove than (dy)/(dx)=(y)/(x).

If cos^(-1)((x^(2)-y^(2))/(x^(2)+y^(2)))=tan^(-1)a then prove that (dy)/(dx)=(y)/(x)

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If cos^(-1)((x^2-y^2)/(x^2+y^2))=tan^(-1)a , prove that (dy)/(dx)=y/xdot

If cos^(-1)((x^2-y^2)/(x^2+y^2))=tan^(-1)a , prove that (dy)/(dx)=y/xdot

If log(x^2+y^2)=2tan^(-1)(y/x), show that (dy)/(dx)=(x+y)/(x-y)

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If log(x^2+y^2)=2tan^(-1)(y/x), show that (dy)/(dx)=(x+y)/(x-y)