Question

what will be the answer.

Answer 1

Answer will be "9".
SinA=√(1-(9²/41²))= 40/41
9SinA= 9x(40/41)

Answer 2

Given cosx=9/41


Sinx=√1-sin²x
       =√1-(81/1681)
       =√(1600/1681)
      =40/41
   ∴ 9sinx + cosx = 9(40/41) + (9/41)
                             =369/41