Find the range of `f(x)=cosec^2x+25sec^2x`. – InterviewSolution

InterviewSolution

1.	Find the range of `f(x)=cosec^2x+25sec^2x`.
Answer» Correct Answer - [-1, 1/3] `f(x)=(1+cot^2x)+25(1+tan^2x)` `=26+cot^2x+25tan^2x` `=26+10+(cot^2x+25tan^2x-10)` `=36+(cotx-5tanx)^2ge36`

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