1. 

   nycmathguy

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   nycmathguy, Mar 14, 2022

   #1
2. 

   MathLover1

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   (sin(7π/8)+sin(π/18))/sin(2π/9)
   =sin(π/18) csc((2 π)/9) + sin(π/8) csc((2 π)/9)
   =0.86549834

    

   MathLover1, Mar 14, 2022

   #2

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3. 

   nycmathguy

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   Can it be simplified without a calculator?

    

   nycmathguy, Mar 15, 2022

   #3
4. 

   MathLover1

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   yes, but this is much easier

    

   MathLover1, Mar 15, 2022

   #4

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5. 

   nycmathguy

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   Ok.

    

   nycmathguy, Mar 15, 2022

   #5