1.

Using properties of determinants, prove that |[sinalpha,cosalpha,cos(alpha+delta)],[sinbeta,cosbeta,cos(beta+delta)],[singamma,cosgamma,cos(gamma+delta)]| = 0

Answer»

Solution :Then split determinant into 2, USING PROPERTY 5.
TAKE `cos delta` from `1^(st)` determinant and `sin delta` from `II^(nd)` as common factor.


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