Question

find the slope of a line rise indination is 105 degree

Answer 1

slope=tan(inclination)
slope =tan(105)
slope =tan(180-75)
slope=-tan(75)
slope = - (√(3) + 1)/(√(3) - 1)

Answer 2

so slope (m) = tan Ф  

here Ф = 105°

so tan 105 = tan (180 - 75) = - tan 75 = - {(tan 45 + tan 30)/(1 - tan 30tan 45)}

= - {(√3 + 1)/(√3 - 1)} ANSWER