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djyliett [7]
4 years ago
6

Sin(5x+15)=cos(4x−6)

Mathematics
1 answer:
Thepotemich [5.8K]4 years ago
8 0

Answer:

Step-by-step explanation:

you know ; for all reals a ; cos(π/2 - a) = sin(a)

so : sin(5x+15) = cos(π/2-(5x+15) ) = cos(π/2-5x-15)

sin(5x+15)=cos(4x−6)  eqivaut : cos(π/2-5x-15) = cos(4x−6)

note : cos(a)=cos(b)  :  a= b +2kπ  or a= - b +2kπ ....k in Z

π/2-5x-15 = 4x−6 + 2kπ    or π/2-5x-15 = - (4x−6) + 2kπ....k in Z

continue calculate : x .......

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emmasim [6.3K]

Answer:

<h2>18000 seconds!</h2>

Step-by-step explanation:

<h2><u>5 hours is 18000 seconds!</u></h2>
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4 years ago
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ANEK [815]

Answer:

8/15 or 0.53

Step-by-step explanation:

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3 years ago
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Greeley [361]

Answer:

P(A \cap B) = P(A) *P(B) =\frac{1}{5} \frac{1}{5}= \frac{1}{25}

So then the best option would be:

a. 1/25

Step-by-step explanation:

For this case we assume that the sample space for the numbers is :

S_1= [A,B,C,D,E]

And the sample space for the numbers is:

S_2 =[1,2,3,4,5]

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We define the following events:

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B= "We select a E from the letters"

We can find the individual probabilities for each event like this:

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And assuming independence we can find the probability required like this:

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The last probability is the probability of obtain obtain a 2 AND an E

So then the best option would be:

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4 years ago
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First fnd SA then times 3/4

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3 years ago
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