1.

The number of distinct real roots of the equation∣∣∣∣cosxsinxsinxsinxcosxsinxsinxsinxcosx∣∣∣∣=0,in the interval [−π4,π4], is

Answer» The number of distinct real roots of the equation




cosxsinxsinxsinxcosxsinxsinxsinxcosx
=0,




in the interval [π4,π4], is


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