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Help 48,49

 May 18, 2018
 #1
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48. 

 

arctan (5.67)  =  79.99°   = 80°

 

 

49.   I just subbed  "x" for "theta"....same difference  

 

sin^2 x                1  - cos^2x         (1 + cos x) (1 - cos x)

________  =      _________  =    _________________  =       1  - cos x

1 + cos x             1 + cos x              1  +  cos x

 

 

 

cool cool cool

 May 18, 2018

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