[" 3.The tangent to the curve given by "...

[" 3.The tangent to the curve given by "x=theta^(t)" cost,"y=theta'" .sint at "t=(pi)/(4)" makes with "x" -axis an angle: "],[[" (A) "0," (B) "(pi)/(4)," (C) "(pi)/(3)," (D) "(pi)/(2)]]

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