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Mathematics
Charity Sanders
6 June, 06:46
The expression cos 4xcos 3x + sin 4r sin 3x is
equivalent to
+2
Answers (
1
)
Melvin Hull
6 June, 09:26
0
Step-by-step explanation:
cos 4x cos 3x + sin 4x sin 3x=cos (4x-3x) = cos x
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