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sin(7x) = sqrt(-3)/2

Guest Jun 1, 2017
 #1
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+1

 

sin (7x)   =  -sqrt (3) / 2

 

Note

 

sin (7x )  =   -sqrt (3) / 2  when either

 

7x    =  4 pi / 3   + 2pi*n    or     7x    =   5 pi/ 3  +  2pi *n   where n is an integer

 

Dividing both by 7, then

 

x  = 4 pi / 21 +  (2pi/7)n        or   x  =  5 pi/ 21  + (2p/7)n     where n is an integer

 

 

cool cool cool

CPhill  Jun 1, 2017

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