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SAI International School
                                                       CLASS - X

               Mathematics
               CHAPTER-8: Introduction to Trigonometry

               HOME ASSIGNMENT- 3



               SUBTOPIC :TrigonometicRatios of Complementary Angles



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                    1.  Without using trigonometric tables evaluate sin29 – cos61  .
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                    2.  Express sin67  + cos75  in terms of trigonometric ratios of angles between 0
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                       and 45 .
                    3.  Prove that :

                    4.  Find the value of tan 1⁰ . tan 2⁰ .  tan 3⁰……… tan 89⁰ .

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                    5.  Given that    +    = 90 , Show that                        −                   =          .
                    6.  Prove that           + tan 90° −      = sec    . sec(90° −    ).

                    7.  Evaluate:






                   Answer:


                       1.  0         4.1            7. 0


















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