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Naya [18.7K]
3 years ago
5

Find an identity for cos(4t) in terms of cos(t)

Mathematics
2 answers:
Ilya [14]3 years ago
4 0
Hello here is a solution :

aleksley [76]3 years ago
3 0
\cos4t=\cos2(2t)=2\cos^22t-1
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