Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

If 2#cos^2x# - #cosx# = 1 , what is the value of #x#?

1 Answer

Apr 2, 2016

#x=0#

Explanation:

As we know:

#cos 0 =1#

Put #x=0# in equation:

#2cos^(2)0-cos0=1#

#2*1-1=1#

#1=1#

#L.H.S=R.H.S#

Related questions

See all questions in Graphing Sine and Cosine

Impact of this question

2068 views around the world

You can reuse this answer
Creative Commons License