If I have $\sin(0.7x-47t+C)$ where do I carry my constant $C$? The same with my sum-to-product identities.
This problem is showing up for me because I'm studying mechanical waves at the moment.
I thank you in advance.
2026-04-01 00:20:38.1775002838
Very simple question regarding sum/difference identity
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Hint: $\sin{(A+C-B)}=\sin{(A)}\cos{(C-B)}+\cos{(A)}\sin{(C-B)}$
Can you use the angle difference identities for sine and cosine from here?