1.

Without expanding evaluate the determinant `|(sinalpha,cosalpha,sin(alpha+delta)),(sinbeta,cosbeta,sin(beta+delta)),(singamma,cosgamma,sin(gamma+delta))|`

Answer» Correct Answer - A
`C_(3) to C_(3) + ("sin"delta)C_(1) -("cos" delta)C_(2)` makes all zeros in `C_(3)` and hence `Delta = 0`


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