Page 1 - HA
P. 1

SAI International School
                                                       CLASS - X

               Mathematics
               CHAPTER-8 : Introduction to Trigonometry

               HOME ASSIGNMENT- 4



               SUBTOPIC :Trigonometric Identities




               1.Prove the following identity:                           .


               2.Prove the following identity








               3.Prove the following identity


                                                                      2
                                  6
                                              6
                                                            2
               4.Prove that              +            + 3                        = 1
                                   4
                                                                2
                                               4
               5.Prove that (          −             + 1)                = 2
                                               2
                                                            4
                                                                       2
               6.Prove that              +            =            −           
                                   4
               7.If tan  =     , show that

               8.If cosӨ + sinӨ = 2cosӨ , show that cosӨ – sinӨ = 2 sinӨ.














                                                              1
   1