How to solve complicated equation for an argument of sine

Multi tool use
Multi tool use

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
1
down vote

favorite












I have an equation which was quite complicated in the begining and I have simplified it upto this point with multiple sine functions and I want to solve for an argument of sine i.e., $phi$,



$$sin(2k+phi)sin(3k+phi)+alphasin^2(2k+phi)+betasin^2ksin(3k+phi)csc(2k+phi)+Asin^2k=0$$



$alpha$, $beta$, $A$ are constants and $k$ is a variable (a number between $-pi$ to $pi$).



I guess if I try to use $sin(a+b)=sin acos b+cos asin b$ at this point, it becomes even more complicated, so is there any alternate trick to solve it for $phi$?







share|cite|improve this question


























    up vote
    1
    down vote

    favorite












    I have an equation which was quite complicated in the begining and I have simplified it upto this point with multiple sine functions and I want to solve for an argument of sine i.e., $phi$,



    $$sin(2k+phi)sin(3k+phi)+alphasin^2(2k+phi)+betasin^2ksin(3k+phi)csc(2k+phi)+Asin^2k=0$$



    $alpha$, $beta$, $A$ are constants and $k$ is a variable (a number between $-pi$ to $pi$).



    I guess if I try to use $sin(a+b)=sin acos b+cos asin b$ at this point, it becomes even more complicated, so is there any alternate trick to solve it for $phi$?







    share|cite|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have an equation which was quite complicated in the begining and I have simplified it upto this point with multiple sine functions and I want to solve for an argument of sine i.e., $phi$,



      $$sin(2k+phi)sin(3k+phi)+alphasin^2(2k+phi)+betasin^2ksin(3k+phi)csc(2k+phi)+Asin^2k=0$$



      $alpha$, $beta$, $A$ are constants and $k$ is a variable (a number between $-pi$ to $pi$).



      I guess if I try to use $sin(a+b)=sin acos b+cos asin b$ at this point, it becomes even more complicated, so is there any alternate trick to solve it for $phi$?







      share|cite|improve this question














      I have an equation which was quite complicated in the begining and I have simplified it upto this point with multiple sine functions and I want to solve for an argument of sine i.e., $phi$,



      $$sin(2k+phi)sin(3k+phi)+alphasin^2(2k+phi)+betasin^2ksin(3k+phi)csc(2k+phi)+Asin^2k=0$$



      $alpha$, $beta$, $A$ are constants and $k$ is a variable (a number between $-pi$ to $pi$).



      I guess if I try to use $sin(a+b)=sin acos b+cos asin b$ at this point, it becomes even more complicated, so is there any alternate trick to solve it for $phi$?









      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Aug 23 at 4:21

























      asked Aug 23 at 4:06









      AtoZ

      64




      64

























          active

          oldest

          votes











          Your Answer




          StackExchange.ifUsing("editor", function ()
          return StackExchange.using("mathjaxEditing", function ()
          StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
          StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
          );
          );
          , "mathjax-editing");

          StackExchange.ready(function()
          var channelOptions =
          tags: "".split(" "),
          id: "69"
          ;
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function()
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled)
          StackExchange.using("snippets", function()
          createEditor();
          );

          else
          createEditor();

          );

          function createEditor()
          StackExchange.prepareEditor(
          heartbeatType: 'answer',
          convertImagesToLinks: true,
          noModals: false,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          noCode: true, onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          );



          );













           

          draft saved


          draft discarded


















          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2891685%2fhow-to-solve-complicated-equation-for-an-argument-of-sine%23new-answer', 'question_page');

          );

          Post as a guest



































          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes















           

          draft saved


          draft discarded















































           


          draft saved


          draft discarded














          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2891685%2fhow-to-solve-complicated-equation-for-an-argument-of-sine%23new-answer', 'question_page');

          );

          Post as a guest













































































          asSs 3EToUMN,DaJI3A F4e0rFL508TnheP,V4 4uUPyYol kv fJ4g9KqDYNL,rkp9F
          ZzbBAh 4x 0mbo7a6Gak1rT,uBhHxz,r

          這個網誌中的熱門文章

          How to combine Bézier curves to a surface?

          Propositional logic and tautologies

          Distribution of Stopped Wiener Process with Stochastic Volatility