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The number of distinct real roots of |(sinx, cosx, cosx), (cosx, sinx, cosx), (cosx, cosx, sinx)| = 0 in the interval - π/4 ≤ x ≤ π/4 is

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The number of distinct real roots of |(sinx, cosx, cosx), (cosx, sinx, cosx), (cosx, cosx, sinx)| = 0 in the interval - π/4 ≤ x ≤ π/4 is 

(a) 0

(b) 2

(c) 1

(d) 3

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1 Answer

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Best answer

The correct option (c) 1

Explanation:

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