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Question
The value of the determinant `abs ((1,0,0),(2, "cos x", "sin x"),(3, "sin x", "cos x"))` is ____________.
Options
1
cos2x
0
sin2x
MCQ
Fill in the Blanks
Solution
The value of the determinant `abs ((1,0,0),(2, "cos x", "sin x"),(3, "sin x", "cos x"))` is cos2x.
Explanation:
expanding along R1
1(cos2x - sin2x ) = cos2x
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