⇒ tan θ = m1 = 1 or θ = 45° Thus, slope of new line is tan (45° + 15°) = tan 60° = √3 (Since it is rotated anti-clockwise, so the angle will be 45° +15° = 60°)
= √3 x + c But it passes through (2, 0), So , c = - 2√3
Thus, required equation is √3 x - y - 2 √3 = 0