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Help 40,41

NotSoSmart  May 8, 2018
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40.

 

Amplitude  =  l  -5  l    =  5

Period....we can solve this......   2pi  / 6  = period   = (1/3) pi    

Last answer

 

41.  cos 315°  is a 45° reference angle in the 4th quadrant....and the cosine is positive in this quadrant.. so..

 

  cos 45°   =   √2 / 2

 

 

 

cool cool cool

CPhill  May 8, 2018

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