If `(3pi)/4 – InterviewSolution

InterviewSolution

1.	If `(3pi)/4
Answer» `sqrt(2cotalpha+1/sin^2alpha)` `=sqrt(2cotalpha+cosec^2alpha)` `=sqrt(2cotalpha+cot^2alpha+1)` `=sqrt((1+cotalpha)^2)` `=\|1+cotalpha\|` As `(3pi)/4 lt alpha lt pi`, `cotalpha` will be negative. `:.\|1+cotalpha\| = -1-cot alpha` So, optopon -`(b)` is the correct option.

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