JEE Main 2016 (8)

Geometry Level 3

If sin2x2sinx1=0\sin^{2}x-2\sin x-1=0 has exactly four different solutions in xx belonging to [0,nπ][0,n\pi] , then the minimum value of non-negative integer value n1n-1 can be __________\text{\_\_\_\_\_\_\_\_\_\_} .


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