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3 years ago

Sin(5x+15)=cos(4x−6)

Mathematics

1 answer:

Thepotemich [5.8K]3 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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Hi guys I need help..... <br> How do you move on??

erma4kov [3.2K]

Answer:

There is no specific set way to move on.

Step-by-step explanation:

In most cases, I would say: time. With time wounds will fade; but scars will always be left behind. Do stuff that distracts you, like hobbies and devote yourself to them. Soon enough you'll forget what even happened to you.

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2 years ago

A recipe says that 1 3/4 cups of baking soda are needed to make 1 batch of a homemade cleaning product, as represented below. Ho

RSB [31]

Answer:

4 3/8 cups of baking soda

Step-by-step explanation:

1 3/4 cups of baking soda are needed to make 1 batch of a homemade cleaning product,

Cups of baking soda : batches of homemade cleaning

1 3/4 cups : 1 batch

How many total cups of baking soda I needed to make 2 1/2 batches of the cleaning product?

Let x = total cups of baking soda needed

Cups of baking soda : batches of homemade cleaning

x cups : 2 1/2 batches

Equate the ratios

1 3/4 cups : 1 batch = x cups : 2 1/2 batches

7/4 ÷ 1 = x ÷ 5/2

7/4 × 1/1 = x * 2/5

7/4 = 2/5x

Divide both sides by 2/5

x = 7/4 ÷ 2/5

= 7/4 × 5/2

Cross product

x = 35/8

= 4 3/8 cups of baking soda

3 0

2 years ago

Write an equation and identify the r value

aliya0001 [1]

Answer:

i) $f(x)=1.1x+0.3$

ii) $r=1$

i) $y=2.5825x+1.4369$

ii) $r=0.9823$

Step-by-step explanation:

We perform a simple linear regression analysis in megastat software to determine the line of best fit for both relations and their associated correlation coefficients.

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2 years ago

Perform the indicated operation and, if possible simplify<br> 2/3-1/7

Fiesta28 [93]

11/21 would be the answer

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2 years ago

some psychologists believe that a genius should be defined as anyone having an IQ over 140. If IQ scores are normally distribute

denis23 [38]

Answer:

61,239,550

Step-by-step explanation:

We let the random variable X denote the IQ scores. This would imply that X is normal with a mean of 100 and standard deviation of 17. We proceed to determine the probability that an individual chosen at random from the population would be a genius, that is;

Pr( X>140)

The next step is to evaluate the z-score associated with the IQ score of 140 by standardizing the random variable X;

$Pr(X>140)=Pr(Z>\frac{140-100}{17})=Pr(Z>2.3529)$

The area to the right of 2.3529 will be the required probability. This area from the standard normal tables is 0.009314

From a population of 6,575,000,000 the number of geniuses would be;

6,575,000,000*0.009314 = 61,239,550

6 0

3 years ago

Read 2 more answers