SOLUTION: Use the given information to find cos(x/2), sin(x/2), and tan(x/2): Cos (x)=-12/13 180 degrees< x < 270 degrees

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Question 1131102: Use the given information to find cos(x/2), sin(x/2), and tan(x/2):
Cos (x)=-12/13
180 degrees< x < 270 degrees
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!








If your given angle is in the range , then the half angle must be in the range , hence the cosine and tangent will be negative and the sine positive.


John

My calculator said it, I believe it, that settles it