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hey! what other numbers can be the solution for cos alpha = -0.5 , rather than 120°?

 Mar 23, 2020
 #1
avatar+12223 
+1

hey! what other numbers can be the solution for cos alpha = -0.5 , rather than 120°?

 

120° + 360° = 480°   480° + 360° = 840° ...  or  120° - 360° = - 240° ...

240° + 360° = 600°   600° + 360° = 960° ...  or  240° - 360° = - 120° ...

 

laugh

 Mar 23, 2020
 #2
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Thank you <3

Guest Mar 23, 2020

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