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Question
The determinant ∆ = `|(cos(x + y), -sin(x + y), cos2y),(sinx, cosx, siny),(-cosx, sinx, cosy)|` is independent of x only.
Options
True
False
Solution
This statement is True.
Explanation:
Apply R1 → R1 + sinyR2 + cosyR3, and expand
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