SOLUTION: use the appropriate sum or difference identity to write the given expression as a function of x alone. cos( x

SOLUTION: use the appropriate sum or difference identity to write the given expression as a function of x alone. cos( x - pi)

Question 766727: use the appropriate sum or difference identity to write the given expression as a function of x alone.
cos( x - pi)
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
use the appropriate sum or difference identity to write the given expression as a function of x alone.
cos( x - pi)
***
cos(x-π)=cosxcosπ+sinxsinπ=cosx(-1)+sinx*0=-cosx
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