Angles between two lines `alpha-beta`

Angle between two lines

Find Angle between two line x sinalpha+ycosalpha=p_(1) and x sin B +ycosB=p_(2)" "(alpha gt beta)

The angle between the lines x cos alpha+y sin alpha=p_(1) and x cos beta+y sin beta=p_(2) when alpha>beta

The angle between the lines x cos alpha+y sin alpha=a and x sin beta-y cos beta=a is (i)beta-alpha(ii)pi-alpha-beta(iii)(pi)/(2)-beta-alpha(iv)(pi)/(2)-

In XeF_(2) , molecule the angle between two lone pair orbitals is alpha , the angle between lone pair orbital and bond pair orbital is beta and the angle between bond pair orbitals is gamma :

Find the angles between two lines.

The angle between lines x cos alpha+y sin alpha=p_(1), and x cos beta+y sin beta=p_(2), where alpha>beta is

If S_(1)=alpha^(2)+beta^(2)-a^(2) , then angle between the tangents from (alpha, beta) to the circle x^(2)+y^(2)=a^(2) , is

If direction angles of a line are alpha, beta, gamma such that alpha+beta=90^(@) , then (cos alpha+cos beta+cos gamma)^(2)=