`A(costheta,sintheta),B(sintheta,-costheta)` are two points then centroid of triangle formed by A ,B and origin lies on a circle whose centre and radius are

A(cos theta, sin theta), B (sin theta,- cos theta) are two points then centroid of triangle formed by A,B and origin lies on a circle whose centre and radius are

A(cos theta, sin theta), B (sin theta,- cos theta) are two points then centroid of triangle formed by A,B and origin lies on a circle whose centre and radius are

If A={:[(costheta,-sintheta),(-sintheta,costheta)]:}, and AB=BA=I" then "B=

The vertices of a DeltaABC has coordinates (costheta,sintheta),(sintheta,-costheta) and (1,2). As theta varies the locus of centroid of the triangle is the circle

If sintheta=a/b , then costheta is equal to

If sintheta=a/b , then costheta is equal to

If x=2+3costheta and y=1-3sintheta represent a circle then the centre and radius is

Evaluate Delta=|{:(sintheta, costheta),(-costheta,sintheta):}|