Question: 3. Let M cos (2???? [ft + ????]) = B cos (2????ft) + C sin(2????ft). Show that B = M cos(2????????)

3. Let M ⋅ cos (2???? [ft + ????]) = B ⋅ cos (2????ft) + C ⋅ sin(2????ft).

Show that B = M ⋅ cos(2????????) and C = −M ⋅ sin(2????????).

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