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वक्र के लिए निर्दिष्ट बिन्दु पर स्पर्श र...

वक्र के लिए निर्दिष्ट बिन्दु पर स्पर्श रेखा और अभिलम्ब कि प्रवणता ज्ञात कीजिए-
`x=a (theta - sin theta), y= a(1+ cos theta), theta= -(pi)/(2)` पर

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