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Show that the least value of a^(2) sec^(...

Show that the least value of `a^(2) sec^(2)x + b^(2) "cosec"^(2)x` is `(a+b)^(2)`.

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AAKASH SERIES-MAXIMA AND MINIMA -Advanced Subjective Type Questions
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  3. Show that the least value of a^(2) sec^(2)x + b^(2) "cosec"^(2)x is (...

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