# 160 - Mathematics Questions Answers

Prove that the system of confocal conics x²/(a² + π) + y²/(b² + π) = 1, π being the parameter is self orthogonal.

**Asked By: SEVAK KUMAR**

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**submit your answer**## (iii) tan69∘+tan66∘+1=tan69∘⋅tan66∘.

**Asked By: KHUSHI**

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