If `y=(sinx+cosecx)^2+(cosx+secx)^2` then the minimum value of `y,AAx in R`, is

If `y=(sinx+cosecx)^2+(cosx+secx)^2` then the minimum value of `y,AAx in R`, is
A. 7
B. 3
C. 9
D. 0

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - C
`y=(sin^2x-cos^2x0+2(sinxcosecx+cosxsecx)+sec^2x+cosec^2x`
`=5+2+tan^2x+cot^2x`
`=7+(tanx-cotx)^2+2`
`:. t_("min")=9`

4 views Answered 2023-02-05 15:29

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