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The equation (cosP-1)x^(2)+(cosP)x+sinP=...

The equation `(cosP-1)x^(2)+(cosP)x+sinP=0` where x is a variable has real roots. Then the interval of may be of the following :

A

`(0,2,pi)`

B

`(-pi,0)`

C

`(-(pi)/(2),(pi)/(2))`

D

`(0,pi)`

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The correct Answer is:
D
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