Limits

Exercises:

1. Solve    = 30,  0

  Solution:  

      Given,  +  3

                                  Let   a

 

                                       30

                       +30

                                 30+810

                                 273 +810

                                 27)3(27)0

                                 27)(

                                Either 27=0    or    30

          When 270

                                      

                           

                                       4a 3 

                                       a 

                                        

                                     

          As,   0 <x<π, hence sine cannot be negative

                                    

                                      Or

          When,   

                                    

                                   

                                    a =

                                  

                                   

          As,   0 <x<π, hence sine cannot be negative

                               

                                   Or     .

                                                          

2. Solve 2

     Solution:

                         We have:  2

   2

                   

         Which gives     

                                            

         If we take   

                                       , then         Or    

         Again, if we take  

                                       , then         Or               

         Therefore, the possible solutions of above equations are

                                            ,        where    .

 

3. Solve 

      Solution:

             We have:  

            Dividing both sides by 2, we get

                                           

                                         

                                        

                                         

                                          

                                             Or 

                                             Or  

 

4. Solve: 

Solution:

                 We have: 

                 Dividing both sides by 2, we get

                             

                             

                               

                             

                             

                             

                               

 

5. Solve: 

Solution:

             We have: 

                                  

                                   

                                          

        Divide the equation by 2

                               

                            

                             

                             

                             

                               

                              

 

6. Find the general solution of the following equation:

     Solution:

              We have 

   

 

                   

                                  

                                   

                                   

                                   

                                   

               Or   

 

7. Find general solution of the following equation:

          

Solution:

      We have:

                            

                                         (

 

                                        

                                       

                                       

                                      

                                      

       As,  so

                                         

                                         

                                         

                               Z

                               Z

 

8. Solve: 

  Solution:

                          We have 

                          

                           

                              [

                          

                            

                            

                              [

                            

                              

                              

                              

                               

                               

                               

                               

                               

                               

 

9. Solve: 

   Solution:

              We have 

                                 

                                 

                                 

[

                  

                              

                               

  

                                

                               

        When