1.

यदि`A=[(1,sin theta, 1),(-sintheta, 1, sin theta),(-1,-sin theta,1)]` जहां `0lethetalepi` हो तो:A. `"det"(A)=0`B. `"det"(A)epsilon(2,oo)`C. `"det"(A)epsilon(2,4)`D. `"det"(A)epsilon[2,4]`

Answer» Correct Answer - D
`:.A=[(1,sin theta, 1),(-sin theta, 1, sin theta),(-1,-sintheta, 1)]`
`implies|A|=|(1,sin theta, 1),(-sin theta, 1, sin theta),(-1, -sin theta, 1)|`
`=1(1+sin^(2)thetas)-sin theta(-sin theta+sin theta)`
`+1(sin^(2)theta+1)=2+2sin^(2)theta`
`0letheta2pi` के ‌लिये
`-1le sin theta le 1implies0le sin^(2)theta le 1`
`implies1le1+sin^(2)thetale2`
`implies2le 2+2sin^(2)theta le4implies2le |A|le4`
`implies"det"A epsilon[2,4]`


Discussion

No Comment Found

Related InterviewSolutions