1. Apr 27, 2016 #1

   prashant singh

   

   To make it useful for any angles. I need a good explanation for this.

    

   prashant singh, Apr 27, 2016
2. 
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3. Apr 27, 2016 #2

   jedishrfu

   

   Insights Author

   Staff: Mentor

   Think about the advantage of having a circle of radius 1. What does the sin and cos of any angle reduce to?

    

   jedishrfu, Apr 27, 2016
4. Apr 27, 2016 #3

   prashant singh

   

   Y and x okkk ,

    

   prashant singh, Apr 27, 2016

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