`Delta ABC` has vertices `A(acosalpha,asinalpha), B(acosbeta,asinbeta)` and `C(acosgamma,asingamma)` then its orthocentre is

The orthocentre of triangle formed by (acosalpha,asin alpha), (acosbeta,asinbeta),(acosgamma,asingamma) is

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

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

Distance between the points A(acosalpha, "asin alpha) and B(acosbeta," asinbeta) is equal to

If a straight line through the origin bisects the line passing through the given points A (acosalpha,asinalpha) and B (acosbeta,asinbeta), then the lines are

If a straight line through the origin bisects the line passing through the given points (acosalpha,asinalpha) and (acosbeta,asinbeta), then the lines

If a straight line through the origin bisects the line passing through the given points (acosalpha,asinalpha) and (acosbeta,asinbeta), then the lines

If a straight line through the origin bisects the line passing through the given points (acosalpha,asinalpha) and (acosbeta,asinbeta), then the lines (a) are perpendicular (b) are parallel (c) have an angle between them of pi/4 (d) none of these

The distance between the point ( acosalpha,asinalpha) and ( acosbeta,asinbeta) is (a) ( b ) (c) acos( d )(( e )alpha-beta)/( f )2( g ) (h) (i) (j) (b) ( k ) (l)2acos( m )(( n )alpha-beta)/( o )2( p ) (q) (r) (s) (c) ( d ) (e)2as in (f)(( g )alpha-beta)/( h )2( i ) (j)( k ) (l) (d) ( m ) (n) asin( o )(( p )alpha-beta)/( q )2( r ) (s) (t) (u)

If a Delta ABC has vertices A ( - 1,7) , B (-7,1) and C(5,-5) then its orthocentre has coordinates :