CBSE Class 11-science Answered

<div>Q)<img src="https://images.topperlearning.com/topper/tinymce/imagemanager/files/ea012630654dc3b111cf2481decc77c4588cb7cf4ce665.17513034ytrew.jpg" alt="" /></div>

Asked by araima2001 | 28 Jan, 2017, 08:55: PM

Expert Answer

begin mathsize 16px style Given space that comma left parenthesis cot to the power of negative 1 end exponent straight x right parenthesis squared minus 3 left parenthesis cot to the power of negative 1 end exponent straight x right parenthesis plus 2 space greater than space 0 Let space cot to the power of negative 1 end exponent straight x space space equals space straight t rightwards double arrow straight t squared space minus space 3 straight t space plus space 2 space greater than space 0 rightwards double arrow space left parenthesis straight t space minus space 2 right parenthesis left parenthesis straight t space minus space 1 right parenthesis space greater than thin space 0 For space left parenthesis straight t space minus space 2 right parenthesis left parenthesis straight t space minus space 1 right parenthesis space greater than thin space 0 either space straight t space minus space 2 space greater than 0 space space and space thin space straight t minus 1 space greater than thin space 0 space space space OR space space space space straight t space minus space 2 space less than 0 space space and space thin space straight t minus 1 space less than thin space 0 Case space 1 colon straight t space minus space 2 space greater than 0 space space and space thin space straight t minus 1 space greater than thin space 0 rightwards double arrow space straight t space greater than thin space 2 space space space and space space straight t space greater than thin space 1 rightwards double arrow cot to the power of negative 1 end exponent straight x space greater than space 2 space space space and space space cot to the power of negative 1 end exponent straight x space greater than 1 rightwards double arrow straight x space greater than space cot space 2 space space and space straight x space greater than thin space cot space 1 So comma space straight x space greater than thin space cot space 1 space... left parenthesis Since space cot space 2 space less than space cot space 1 right parenthesis Case space 2 colon straight t space minus space 2 space less than 0 space space and space thin space straight t minus 1 space less than thin space 0 rightwards double arrow space straight t space less than thin space 2 space space space and space space straight t space less than thin space 1 rightwards double arrow cot to the power of negative 1 end exponent straight x space less than space 2 space space space and space space cot to the power of negative 1 end exponent straight x space less than 1 rightwards double arrow straight x space less than space cot space 2 space space and space straight x space less than thin space cot space 1 So comma space straight x space less than space cot space 2 space.... left parenthesis Since space cot space 2 space less than space cot space 1 right parenthesis So comma space from space case space 1 space and space case space 2 comma space straight x space less than space cot space 2 space or space straight x space greater than thin space cot space 1 end style

Answered by Rebecca Fernandes | 29 Jan, 2017, 08:15: PM

Practice Test

Webinar

Pre Board Assessment

CBSE Class 11-science Answered

Concept Videos

CONTACT

CBSE Class 11-science Answered

Concept Videos

Choose Filters

Get in Touch