Question

Find the slope of the line whose inclination are 120 degree

Answer 1

Answer:

slope = -√3

Step-by-step explanation:

here the inclination of angle is 120°

we know, tanΦ = slope

put the value of Φ = 120°

tan 120° = slope

tan (π - 120° ) = - tan60°

...[since tan (π - Φ ) = -tanΦ

or tan (180 - Φ) = - tan Φ]

we know , tan60° = √3

therefore, -tan60° = -√3

slope = -tan60° = -√3

hence the slope of line whose inclination are 120 degree is -√3