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

Question

3 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] · Answer 1 · 2021-11-18T06:01:50+03:00

Leona [35]3 years ago

8 0

Answer:

d

Step-by-step explanation:

mel-nik [20] · Answer 2 · 2021-11-18T04:39:18+03:00

mel-nik [20]3 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.