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3 years ago

How would you verify the trigonometric identity 2x = 2sinx cosx

Mathematics

2 answers:

ad-work [718]3 years ago

7 0

Answer:

Step-by-step explanation:

2x = 2sinx cosx is not an identity. An identity is "always true," whereas a conditional equation is true only for specific value(s) of the unknown. Double check to ensure that you have copied down this problem correctly.

dem82 [27]3 years ago

5 0

Step-by-step explanation:

Hi, there!!

I hope you mean sin2x=2sinx . cosx

so, let's begin in a simple way; by adding, alright:

sin2x= sin(x+x) (as 2x=x+x).

now, let's use compound formula for sin,

so, we get:

sin (x+x)= sinx.cosx + cosx. sinx (as sin(A+B)=sin A. cosB + cosA . sinB)

or, sin (x+x)=2sinx.cosx (adding both).

Therefore, sin 2x = 2sinx. cosx.

Hope it helps..

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A band sold out 4 of its last 20 shows. What is the experimental probability that the band's

kykrilka [37]

Answer:

$\frac{1}{5}$ probability

Step-by-step explanation:

P(Sold Out)= $\frac{4}{20}$

$\frac{4}{20} =\frac{1}{5}$

So since the experimental probability is the number of times an event occurs out of the total number of trials...

The answer to "what is the experimental probability that the band's next show will be sold out?" Is $\frac{1}{5}$ !!!

Hope this helped you!

Have a nice evening!

8 0

3 years ago

Evaluate. Write your answer as a fraction or whole number without exponents.

Aleks [24]

The answer to the question is 1/27

3 0

2 years ago

Read 2 more answers

Given the function p below, which statement correctly compares the values of p(1) and p(2)? P(x)=4 x

oksano4ka [1.4K]

Answer:

The value of P(2) is twice that of P(1).

Step-by-step explanation:

P(x) = 4x so:

P(1) = 4*1 = 4 and

P(2) = 4*2 = 8.

7 0

3 years ago

Need to know asap plz help

morpeh [17]

6/8 or 3/4
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5 0

3 years ago

A company sets up a food booth at the county fair. The fee for the food booth is $100 plus $5 per day. The fee for the game boot

san4es73 [151]

Answer:

$210

Step-by-step explanation:

We will model the food booth and game booth as linear functions $f(x)=mx+b$ where $m$ is the charge per day, $b$ is the flat fee, and $x$ is the number of days.

Food booth: $F(x)=5x+100$

Game booth: $G(x)=7x+50$

We solve for both equations, letting $x=5$ :

$F(5)=25+100=125$

$G(5)=35+50=85$

We add the two values to obtain the total cost of $210.

4 0

2 years ago