Q.
A quadratic equation whose roots are cosec2θ and sec2θ can be
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a
x2−2x+2=0
b
x2−3x+3=0
c
x2−x+1=0
d
None of these
answer is D.
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Detailed Solution
Sum of roots=sec2θ+cosec2θ=1cos2θ+1sin2θ = 4sin22θ≥4Also, product of roots=sec2θcosec2θ=4sin22θ≥4∴The required quadratic equation will be x2−tx+t=0 where t≥4.
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