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Dafna1 [17]
2 years ago
11

(HELP ASAP HIGH POINTS) Which double-angle or half-angle identity would you use to verify the following:

Mathematics
1 answer:
Rashid [163]2 years ago
5 0

Answer:

B

Step-by-step explanation:

Using the trigonometric identities

• cscx = \frac{1}{sinx} and secx = \frac{1}{cosx}

Consider the left side

cscx sec x = \frac{1}{sinx} × \frac{1}{cosx} = \frac{1}{sinxcosx}

Consider the right side

2 csc2x = \frac{2}{sin2x} = \frac{2}{2sinxcosx} = \frac{1}{sinxcosx}

left side = right side hence identity is verified

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If you can tell me what the missing number is.
Orlov [11]

Answer:

6

Step-by-step explanation:

So, to start answering this, lets recall the formula for a rectangles volume:

This formula is :

V=h*w*l

Lets plug in what we know, and solve for the missing variable.

We know that height(h) is 7.

We know that width(w) is 9.

We know that volume(V) is 378.

We are missing length(l)

So:

378=7*9*l

To find length(l), we must iscolate it.

To do this, we must get rid of the 7 and 9.

So lets start by dividing 378 by 9:

378/9=7*9/9*l

=

42=7*l

Now lets do the same thing with the 7 to iscolate l:

42/7=7/7*l

=

6=l

So our missing length(l) is 6.

Answer:

l = 6

Hope this helps!

5 0
2 years ago
Solve for m.<br> 8m+95&lt;−87m+5
tiny-mole [99]

Answer:

m < -\frac{18}{19}

Step-by-step explanation:

8m + 95 < -87m + 5

8m + 87m < 5 - 95

95m < -90

m < -<u>\frac{90}{95}</u>

Simplifying gives;

m < -\frac{18}{19}

3 0
3 years ago
Read 2 more answers
You are researching the average emails received per day. You want to know how many employees you should survey if you want to kn
IrinaK [193]

Answer:

The value is  n =29 \ employees

Step-by-step explanation:

Generally the number of employee to survey(sample size) is mathematically represented as

       n = [ \frac{z *  \sigma }{E} ]^2

Here E is the margin of error which is given as E = 47

So substituting 1.645 for z and   155 for  \sigma

     n = [ \frac{1.645 *  155 }{47} ]^2

=>    n =29 \ employees

     

         

5 0
3 years ago
Which numbers are irrational
frozen [14]
<span>"An </span>irrational number<span> can't be expressed as a ratio between 2 </span>numbers,<span> it can't be written as a simple fraction because there is not a finite </span>number<span> of </span>numbers<span> when written as a decimal. The </span>numbers<span> in the decimal would go on forever, without repeating.</span>
6 0
3 years ago
I know this is probably gonna taken down as soon as I post it bc people stalking my account but can anyone tell me happened on t
Aleksandr-060686 [28]

Answer:

it talks about the tapes on peoples doors

Step-by-step explanation:

you can watch riverdale seaon 5 on cw for free. hope this helps!

7 0
3 years ago
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