+0  
 
+5
212
1
avatar

Im a bit confused, are the values going to be the same on the unit circle for cos and sin, even though the radian is negative?

Guest Feb 27, 2017
 #1
avatar+87293 
0

cos (-2pi/3)   = 

 

cos (2pi - 2pi/3)   =  cos ( [ 6pi - 2pi] / 3)  =  cos (4pi / 3) =  cos(240°)  =  -1/2

 

And sine of the same  angle  =  -√3 / 2

 

 

cool cool cool 

CPhill  Feb 27, 2017

17 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.