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Range of the function `f(x)=cos^(-1)x+2cot^(-1)x+3cosec^(-1)x` is equal toA. `[pi,2pi]`B. `{pi,2pi}`C. `{2pi,3pi}`D. `[2pi,3pi]` |
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Answer» Correct Answer - B Domain is `{-1,1}` `becausef(-1)=pi+(3pi)/(2)-(3pi)/(2)=pi` `f(1)=0+(pi)/(2)+(3pi)/(2)=2pi` Range is `{pi,2pi}` |
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