SOLUTION: Factor the expression and use the fundamental identities to simplify. Use a graphing utility to verify your result:
1-2cos^2x+cos^4x
Algebra.Com
Question 827944: Factor the expression and use the fundamental identities to simplify. Use a graphing utility to verify your result:
1-2cos^2x+cos^4x
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
1-2cos^2x+cos^4x
..
cos(x)+1=0
cos(x)=-1(mult.2)
x=π/2,3π/2
or
cos(x)-1=0
cos(x)=1(mult.2)
x=0,π
..
see graph below:
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