1.

Consider the system of liner equations in x, y andz ( sin 3 theta ) x - y + x = 0 ( cos2 theta ) x + 4 y + 3 z = 02 x + 7 y + 7 z = 0which of the followingcan be the values of thetafor whichthe systemhas a non-trivial solution

Answer»

`n pi + ( - 1)^(n) pi // 6 , AA n in Z`
` n pi + ( - )^(n) pi// 3, AA n in Z`
` n pi + ( - 1)^(n) pi // 9, AA n in Z`
` n pi + ( - 1)^(n) (pi)/( 12) , AA n in Z`

Answer :A


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