The distance between the points `(acosalpha,asinalpha)` and `(acosbeta,asinbeta)` where `a>0`

The distance between the point ( acosalpha,asinalpha) and ( acosbeta,asinbeta) is

The distance between the point ( acosalpha,asinalpha) and ( acosbeta,asinbeta) is

The distance between the points (a cosalpha, a sinalpha) and (a cosbeta, a sinbeta) where a> 0

The distance between the points (a cosalpha, a sinalpha) and (a cosbeta, a sinbeta) where a> 0

The distance between the points (a cosalpha, a sinalpha) and (a cosbeta, a sinbeta) where a> 0

The distance between the points (a cosalpha, a sinalpha) and (a cosbeta, a sinbeta) where a> 0

The distance between the points (a cosalpha, a sinalpha) and (a cosbeta, a sinbeta) where a> 0

The distance between the points (a cos alpha,a sin alpha) and (a cos beta,a sin beta) where a> 0

The distance between the points (a cos alpha,a sin alpha) and (a cos beta,a sin beta) where a>0

Show that the distance between the points P(acosalpha, asinalpha) and Q(a cos beta,a sinbeta) is 2a sin(a-b)/(2)