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Straight Lines And Pair Of Straight Lines

WB JEE 2025

MCQ+1 / -0.252025

ধরা যাক তিনটি বিন্দু হল $P(\cos \alpha, \sin \beta), Q(\sin \alpha, \cos \beta)$ এবং $R(0,0)$, যেখানে $0<\alpha, \beta<\frac{\pi}{4}$ । তাহলে

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