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ABC is a right triangle right angled at C. Let BC = a, CA = b, AB = c and let p be the length of perpendicular from C on AB. Prove that (i) pc = ab (ii) `(1)/(p^(2)) = (1)/(a^(2)) + (1)/(b^(2))` .

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The correct Answer is:
` (1)/(a^(2)) + (1)/(b^(2))` .
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