A particle is moving in a circular path whose portion vector is given by barr= (acost)hat i +(asin t)hat jthen, the tangential component of acceleration at t= (pi)/(2)sec is

A particle is moving in a circular path whose portion vector is given

1.	A particle is moving in a circular path whose portion vector is given by barr= (acost)hat i +(asin t)hat jthen, the tangential component of acceleration at t= (pi)/(2)sec is
Answer» 0 `am //SEC^(2)` `a//2 m//sec^(2)` `a//4 m//sec^(2)` ANSWER :A