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If `0<alpha<beta<gamma<pi/2`, then the equation `(x-sin beta)(x-sin gamma)+(x-sin alpha)(x-sin gamma)+(x-sin alpha)(x-sin beta)=0` has-
A. |
real and unequal roots |
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B. |
non-real roots |
C. |
real and equal roots |
D. |
real and unequal roots greater than 2 |