AP EAMCET Engineering 2018 Apr 24 Shift 1 Paper

Section: Mathematics

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Question : 11 of 160

Marks: +1, -0

If the quadratic equation 4sec2α.x2+2x+ (β2−β+

1

2

)=0 has real roots, then the value of cos2α+cos−1β is

π
3
π
3
+1
π
2
π
2
−1

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