यदि ` 2sin theta =x+ (1)/(x) ,` सिद्ध कीजिए| ` sin 3theta +(1)/(2) (x^(3) +( 1)/(x^(3)) )= 0 `

Answer

अतः ` " " sin 3theta +(1)/(2) (x^(3) +(1)/(x^(3)) ) =0`