वृत्त \( x^{2}+y^{2}=a^{2} \) पर प्राचल बिन्दु है- (a) \( (a \cos \theta, a \sin \theta) \) (b) ...

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वृत्त \( x^{2}+y^{2}=a^{2} \) पर प्राचल बिन्दु है-
(a) \( (a \cos \theta, a \sin \theta) \) (b) \( (a \cos \theta, b \sin \theta) \)
(c) \( (b \cos \theta, a \sin \theta) \) (d) इनमें से कोई नहीं।
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