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If sin theta,costheta are the roots of t...

If `sin theta,costheta` are the roots of the equation `ax^2+bx+c`=0 then find the value of `(a+c)^2/(b^2+c^2)`

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  11. Find the set of all x for which : (2x)/(2x^2+5x+2)gt1/(x+1)

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  12. Solve the following inequalities : (x-1)/(x^2-4x+3)lt1

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  13. Solve the following inequalities : (x^2-2x-1)/(x+1)ltx

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  19. The roots of the quadratic equation 2x^2+3x+1=0 are

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