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INTRODUCTION OF TRIGNOMETRY

Trigonometry  (from  Greek   trigōnon , "triangle" and  metron , "measure" [1] ) is a branch of  mathematics  that studies relationships between side lengths and  angles  of  triangles . The field emerged in the  Hellenistic world  during the 3rd century BC from applications of  geometry  to  astronomical studies .  The Greeks focused on the  calculation of chords , while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called  trigonometric functions ) such as  sine . [3] Throughout history, trigonometry has been applied in areas such as  geodesy ,  surveying ,  celestial mechanics , and  navigation . [4] Trigonometry is known for its many  identities , [5] [6]  which are equations used for rewriting trigonometrical expressions to solve equations, to find a more useful expression, or to discover new re...
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Ex.no 2:

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To browse the internet, using a computer/ laptop, identify and use education related websites and video/audio resources in teaching- learning. https://www.youtube.com/watch?v=7pZxM1Chx3U   https://www.youtube.com/watch?v=jzwElnpk1YQ https://www.youtube.com/watch?v=eWAzPmJYDI8 Type a  web address —also known as a  URL —into the address bar, then press  Enter . The website will appear. To search the web: Some browsers use an  address bar  for navigating to websites and a  search bar  for conducting web searches. Internet Explorer 11 combines both of these functions into the address bar. Click the address bar and begin typing  search terms . As you're typing, Internet Explorer will display suggestions for search terms and related websites. You may also see  History  results, which are websites you've previously visited. Click one of the suggestions to navigate to a website or see search results. You can also fini...
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INTRODUCTION OF BASIC ALGEBRA

BASIC ALGEBRA What is Algebra?            Algebra is the branch of mathematics that uses letters in place of some unknown numbers. You've been using algebra since your early schooling, when you learned formulas like the  area of a rectangle , with width  w , height  h : A  =  w  ×  h We used  letters to stand for numbers.  Once we knew the width and height, we could substitute them into the formula and find our area. Another one you may have seen is the  area of a circle , with radius  r : A  = π r 2 As soon as we know the length of the sides, we can find the area. Literal numbers  (the letters used in algebra) can either stand for  variables  (the value of the letter can change, like the  w ,  h  and  r  in the examples of the area of a rectangle and the area of a circle) or  constants  (where the value does not change), fo...
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