1.

If `0ltxlt(pi)/(2)`, then the minimum value of `(sinx+cosx+cosec2x)`,isA. 27B. `(27)/(2)`C. `(25)/(4)`D. none of these

Answer» Correct Answer - D
Using `A.M.geG.M.,` we have
`(sinx+cosx+cosec2x)/(3)ge(sinx+cosx+cosec2x)^(1//3)`
`sinx+cosx+cosec2ge3((1)/(3))^(1//3)=3xx1.2599=3.779`


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