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Akimi4 [234]
3 years ago
8

Pls helppp I’ll mark u brainliest

Mathematics
1 answer:
jasenka [17]3 years ago
5 0

Answer:

I believe the answer to this question is (4,1)

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Identify the correct equation that describe the relationship between a sine and cosine wave. a. v(t) = A sin (2πft + π/2) = A co
Flauer [41]

Answer:

A. v(t) = sin (2πft + π/2) = A cos (2πft)

Step-by-step explanation:

According to trigonometry friction, the following relationship are true;

Sin(A+B) = sinAcosB + cosAsinB

We will be using this relationship to check which option is true.

Wave equation is represented as shown;

y(t) = Asin(2πft±theta)

For positive displacement,

y(t) = Asin(2πft+theta)

If theta = π/2

y(t) = Asin(2πft+π/2)

y(t) = A[ sin 2πftcosπ/2 + cos2πft sin π/2]

Since sinπ/2 = 1 and cos (π/2) = 0

y(t) = A[ sin 2πft (0)+ cos2πft (1)]

y(t) = A[0+ cos2πft]

y(t) = Acos2πft

Hence the expression that is true is expressed as;

v(t) = Asin(2πft+π/2) = Acos2πft

8 0
3 years ago
URGENT! WILL GIVE BRAINLIEST IF CORRECT
cupoosta [38]

Answer:

The answer is 25.5.

Step-by-step explanation:

30% of $85 is 25.5.

4 0
3 years ago
Read 2 more answers
The St. Croix junior hockey
Alja [10]

Answer:

14

Step-by-step explanation:

56 divided by 4 is 14

7 0
3 years ago
Nadya has 19 1/4 yards of ribbbon she cuts ribbon into peices that measure 1 3/4 how many pieces of ribbon doe Nadya have?
tiny-mole [99]

Answer:

11

Step-by-step explanation:

Well basically i took 19 1/4 and divided it by 1 3/4 and there for i got 11. YOUR WELCOME.

4 0
3 years ago
Translate the word phrase into a variable expression.
NemiM [27]
<span>The word decreased by means subtract.
So...
Lets look at A.
A: a-b
Sound correct?
No,
Because the sentence said that "a is decreased by the number b."
Lets look at B.
B. b-a
Sound correct?
Yes,
Because a is getting decreased by b.

Your answer is, B.


Hope this helps!(:
</span>
8 0
3 years ago
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