Aligning two equations on a selected pair of symbols

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4














How can I center an equation according to Leftrightarrow? I would like the secondLeftrightarrow to be below the first.



documentclass[12pt,a4paper]report
begindocument

beginequation
x = r cos varphi = 0 qquad Leftrightarrow qquad cosvarphi = 0,
endequation

beginequation
y= 56 qquad Leftrightarrow qquad sinalpha = ,
endequation


enddocument









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  • I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
    – Mico
    Dec 26 '18 at 14:03










  • OK, thank you, it was just example
    – Elisabeth
    Dec 26 '18 at 14:04






  • 2




    Leftrightarrow can be replaced with iff
    – user94293
    Dec 26 '18 at 20:19















4














How can I center an equation according to Leftrightarrow? I would like the secondLeftrightarrow to be below the first.



documentclass[12pt,a4paper]report
begindocument

beginequation
x = r cos varphi = 0 qquad Leftrightarrow qquad cosvarphi = 0,
endequation

beginequation
y= 56 qquad Leftrightarrow qquad sinalpha = ,
endequation


enddocument









share|improve this question























  • I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
    – Mico
    Dec 26 '18 at 14:03










  • OK, thank you, it was just example
    – Elisabeth
    Dec 26 '18 at 14:04






  • 2




    Leftrightarrow can be replaced with iff
    – user94293
    Dec 26 '18 at 20:19













4












4








4


1





How can I center an equation according to Leftrightarrow? I would like the secondLeftrightarrow to be below the first.



documentclass[12pt,a4paper]report
begindocument

beginequation
x = r cos varphi = 0 qquad Leftrightarrow qquad cosvarphi = 0,
endequation

beginequation
y= 56 qquad Leftrightarrow qquad sinalpha = ,
endequation


enddocument









share|improve this question















How can I center an equation according to Leftrightarrow? I would like the secondLeftrightarrow to be below the first.



documentclass[12pt,a4paper]report
begindocument

beginequation
x = r cos varphi = 0 qquad Leftrightarrow qquad cosvarphi = 0,
endequation

beginequation
y= 56 qquad Leftrightarrow qquad sinalpha = ,
endequation


enddocument






math-mode equations






share|improve this question















share|improve this question













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edited Dec 26 '18 at 16:01









Circumscribe

4,8011533




4,8011533










asked Dec 26 '18 at 13:41









ElisabethElisabeth

4876




4876











  • I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
    – Mico
    Dec 26 '18 at 14:03










  • OK, thank you, it was just example
    – Elisabeth
    Dec 26 '18 at 14:04






  • 2




    Leftrightarrow can be replaced with iff
    – user94293
    Dec 26 '18 at 20:19
















  • I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
    – Mico
    Dec 26 '18 at 14:03










  • OK, thank you, it was just example
    – Elisabeth
    Dec 26 '18 at 14:04






  • 2




    Leftrightarrow can be replaced with iff
    – user94293
    Dec 26 '18 at 20:19















I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
– Mico
Dec 26 '18 at 14:03




I can't help but comment that if Leftrightarrow is supposed to mean "if and only if", the statement in the first equatioin is incorrect: rcosvarphi=0 is true if either cosvarphi=0 or r=0.
– Mico
Dec 26 '18 at 14:03












OK, thank you, it was just example
– Elisabeth
Dec 26 '18 at 14:04




OK, thank you, it was just example
– Elisabeth
Dec 26 '18 at 14:04




2




2




Leftrightarrow can be replaced with iff
– user94293
Dec 26 '18 at 20:19




Leftrightarrow can be replaced with iff
– user94293
Dec 26 '18 at 20:19










2 Answers
2






active

oldest

votes


















5














I suggest you



  • replace the two equation enviroments with a single align environment, and

  • insert & alignment points in front of the two Leftrightarrow directives.

The align LaTeX environment is one of several tools the amsmath package provides for typesetting multi-line math constructs. It would be an excellent idea for you to familiarize yourself with the user guide of the amsmath package.



enter image description here



documentclass[12pt,a4paper]report
usepackageamsmath % for 'align' environment
begindocument
beginalign
x=rcosvarphi=0 qquad &Leftrightarrow qquad cosvarphi=0 \
y = 56 qquad &Leftrightarrow qquad sinalpha=dotsc
endalign
enddocument





share|improve this answer




























    3














    Thank's to @Mico



    documentclass[12pt,a4paper]report 
    usepackageamsmath
    begindocument
    beginalign
    x = r cos varphi = 0 qquad &Leftrightarrow qquad cosvarphi = 0, \
    y= 56 qquad &Leftrightarrow qquad sinalpha =0 ,
    endalign
    enddocument





    share|improve this answer






















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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      5














      I suggest you



      • replace the two equation enviroments with a single align environment, and

      • insert & alignment points in front of the two Leftrightarrow directives.

      The align LaTeX environment is one of several tools the amsmath package provides for typesetting multi-line math constructs. It would be an excellent idea for you to familiarize yourself with the user guide of the amsmath package.



      enter image description here



      documentclass[12pt,a4paper]report
      usepackageamsmath % for 'align' environment
      begindocument
      beginalign
      x=rcosvarphi=0 qquad &Leftrightarrow qquad cosvarphi=0 \
      y = 56 qquad &Leftrightarrow qquad sinalpha=dotsc
      endalign
      enddocument





      share|improve this answer

























        5














        I suggest you



        • replace the two equation enviroments with a single align environment, and

        • insert & alignment points in front of the two Leftrightarrow directives.

        The align LaTeX environment is one of several tools the amsmath package provides for typesetting multi-line math constructs. It would be an excellent idea for you to familiarize yourself with the user guide of the amsmath package.



        enter image description here



        documentclass[12pt,a4paper]report
        usepackageamsmath % for 'align' environment
        begindocument
        beginalign
        x=rcosvarphi=0 qquad &Leftrightarrow qquad cosvarphi=0 \
        y = 56 qquad &Leftrightarrow qquad sinalpha=dotsc
        endalign
        enddocument





        share|improve this answer























          5












          5








          5






          I suggest you



          • replace the two equation enviroments with a single align environment, and

          • insert & alignment points in front of the two Leftrightarrow directives.

          The align LaTeX environment is one of several tools the amsmath package provides for typesetting multi-line math constructs. It would be an excellent idea for you to familiarize yourself with the user guide of the amsmath package.



          enter image description here



          documentclass[12pt,a4paper]report
          usepackageamsmath % for 'align' environment
          begindocument
          beginalign
          x=rcosvarphi=0 qquad &Leftrightarrow qquad cosvarphi=0 \
          y = 56 qquad &Leftrightarrow qquad sinalpha=dotsc
          endalign
          enddocument





          share|improve this answer












          I suggest you



          • replace the two equation enviroments with a single align environment, and

          • insert & alignment points in front of the two Leftrightarrow directives.

          The align LaTeX environment is one of several tools the amsmath package provides for typesetting multi-line math constructs. It would be an excellent idea for you to familiarize yourself with the user guide of the amsmath package.



          enter image description here



          documentclass[12pt,a4paper]report
          usepackageamsmath % for 'align' environment
          begindocument
          beginalign
          x=rcosvarphi=0 qquad &Leftrightarrow qquad cosvarphi=0 \
          y = 56 qquad &Leftrightarrow qquad sinalpha=dotsc
          endalign
          enddocument






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Dec 26 '18 at 13:55









          MicoMico

          274k30371757




          274k30371757





















              3














              Thank's to @Mico



              documentclass[12pt,a4paper]report 
              usepackageamsmath
              begindocument
              beginalign
              x = r cos varphi = 0 qquad &Leftrightarrow qquad cosvarphi = 0, \
              y= 56 qquad &Leftrightarrow qquad sinalpha =0 ,
              endalign
              enddocument





              share|improve this answer



























                3














                Thank's to @Mico



                documentclass[12pt,a4paper]report 
                usepackageamsmath
                begindocument
                beginalign
                x = r cos varphi = 0 qquad &Leftrightarrow qquad cosvarphi = 0, \
                y= 56 qquad &Leftrightarrow qquad sinalpha =0 ,
                endalign
                enddocument





                share|improve this answer

























                  3












                  3








                  3






                  Thank's to @Mico



                  documentclass[12pt,a4paper]report 
                  usepackageamsmath
                  begindocument
                  beginalign
                  x = r cos varphi = 0 qquad &Leftrightarrow qquad cosvarphi = 0, \
                  y= 56 qquad &Leftrightarrow qquad sinalpha =0 ,
                  endalign
                  enddocument





                  share|improve this answer














                  Thank's to @Mico



                  documentclass[12pt,a4paper]report 
                  usepackageamsmath
                  begindocument
                  beginalign
                  x = r cos varphi = 0 qquad &Leftrightarrow qquad cosvarphi = 0, \
                  y= 56 qquad &Leftrightarrow qquad sinalpha =0 ,
                  endalign
                  enddocument






                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Dec 26 '18 at 15:37









                  sztruks

                  1,541717




                  1,541717










                  answered Dec 26 '18 at 13:56









                  Hafid BoukhouldaHafid Boukhoulda

                  2,0971517




                  2,0971517



























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