Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

If cosx = 1/2 what is cos 2x?

1 Answer

Jun 27, 2018

#-1/2#

Explanation:

#cosx=1/2#

#cosx=1/2 # when # x=pi/3#

#cos(2x)=cos((2pi)/3)#

#cos((2pi)/3)=-1/2#

Related questions

Impact of this question

4816 views around the world

You can reuse this answer
Creative Commons License