The Total solution for NCERT class 6-12
We know that, if a line makes an angle of 30° with the positivedirection of y-axis measured anti-clock-wise , then the angle made by the linewith the positive direction of x- axis measure anti-clock-wise is 90° + 30° =120°
∴ Theslope of the given line is tan 120° = tan (180° – 60°)
= – tan 60°
= –√3