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blsea [12.9K]
4 years ago
12

Analysis of the voltage in certain types of circuits involves terms of the form sin(nw^0t-90 degrees) where n is a positive inte

ger, w0 is the frequency of the voltage, and t is time. Use an identity to simplify this expression.
A.cscnw0t
B.-cscnw0t
C.cosnw0t
D.-cosnw0t

Mathematics
2 answers:
Leona [35]4 years ago
8 0

Answer:

d

Step-by-step explanation:

mel-nik [20]4 years ago
5 0

Answer:

  D.  -cos(nw0t)

Step-by-step explanation:

Subtracting 90° from the argument of the sine function shifts its graph 90° to the right, putting the negative peak on the y-axis. That corresponds to the negative cosine function, choice D.

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