# No links please(iv)  If a triangle ABC inscribed in a fixed circle be slightly varies in such a way as to have its varies aways  on the circle, then show that

Dear student
There is a printing mistake in the question.
The correct question is  If a triangle ABC inscribed in a fixed circle be slightly varies in such a way as to have its varies always  on the circle, then show that $\frac{\mathrm{da}}{\mathrm{cosA}}+\frac{\mathrm{da}}{\mathrm{cos}\mathrm{B}}+\frac{\mathrm{da}}{\mathrm{cos}\mathrm{C}}=0$

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Hi,
Here is the solution:

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