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y2b2-x2a2=1 অধিবৃত্তের পরামিতিক সমীকরণ কোনটি?
x = a tanθ, y = b sec θ
x = a secθ, y = b tan θ
x = a cos θ, y = b sin θ
x = a cos θ, y = b tan θ
ANS : 1
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