1.

Let △=∣∣∣∣sinnπcosnπ2cos2xcosxsinxtannπ−12cos(2nπ)∣∣∣∣ and △=0 ∀ x∈R. Then the value of n can be

Answer»

Let =
sinnπcosnπ2cos2xcosxsinxtannπ12cos(2nπ)
and =0 xR. Then the value of n can be



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