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If a in (0,1)a n df(a)=(a^2-a+1)+(8sin^2...

If `a in (0,1)a n df(a)=(a^2-a+1)+(8sin^2a)/(sqrt(a^2-a+1))+(27 cos e c^2a)/(sqrt(a^2-a+1))` , then the least value of `(f(a))/2` is_______

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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