In Exercises 101114, verify the identity algebraically. Use a graphing utility to check
Chapter 6, Problem 104(choose chapter or problem)
In Exercises 101–114, verify the identity algebraically. Use a graphing utility to check your result graphically.
\(\cos ^{4} x-\sin ^{4} x=\cos 2 x\)
Text Transcription:
cos^4 x − sin^4 x = cos 2x
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