- #1

gsan

- 22

- 0

1. cos(4t-1)u(t-1)

2. cos4(t-1)u(t-1)

I want to compare the difference between these two answer. Thanks!

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- Thread starter gsan
- Start date

- #1

gsan

- 22

- 0

1. cos(4t-1)u(t-1)

2. cos4(t-1)u(t-1)

I want to compare the difference between these two answer. Thanks!

- #2

Gokul43201

Staff Emeritus

Science Advisor

Gold Member

- 7,176

- 22

gsan, you've been told before that we can not help you until you first show us your effort.

- #3

gsan

- 22

- 0

gsan, you've been told before that we can not help you until you first show us your effort.

e^-s/(s^2 + 4^2) is the answer for i. or ii. ?

- #4

lightgreen

- 14

- 0

Please correct me if I'm wrong. Thank you!

- #5

Tareth

- 5

- 0

For part ii you need to use the idenity for cos(A-B)

cos(a - b) = cos(a)cos(b) + sin(a)sin(b)

cos(a - b) = cos(a)cos(b) + sin(a)sin(b)

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