Let the angle made by the line OA with respect to positive x-axis be θ1 and the angle made by OB be θ2. Find the value of θ1+θ2(0≤|θ1|,|θ2|≤180∘). Angle measured in clockwise direction is negative and angle measured in anti-clockwise direction is positive.
A line through the point A(2, 0), which makes an angle of 30∘ with the positive direction of x-axis is rotated about A in clockwise direction through an angle 15∘. The equation of the straight line in the new position is