SOLUTION: use the appropriate sum or difference identity to write the given expression as a function of x alone.
cos( x - pi)
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cos( x - pi)
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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)
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cos(x-π)=cosxcosπ+sinxsinπ=cosx(-1)+sinx*0=-cosx
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