the angle made by tangent to parabola 4x^2= y at the point (1/8, 1) with x-axis
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the angle of elevation of the top C of a vertical tower CD of height h from a point A in the horizontal tower is 45° and from a point B at a distance a from A on the line making an angle of 30° with AD,it is 60°.if angle cba=50k .then value of k is.
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