3 years ago

If something is not a function does that mean x does repeat or no.

Mathematics

2 answers:

klemol [59]3 years ago

8 0

No x cant be repeated

Neko [114]3 years ago

4 0

No "x" can not be repeated, a function has one x-element and one y-element

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Prove that sinxtanx=1/cosx - cosx

maks197457 [2]

Answer:

See below

Step-by-step explanation:

We want to prove that

$\sin(x)\tan(x) = \dfrac{1}{\cos(x)} - \cos(x), \forall x \in\mathbb{R}$

Taking the RHS, note

$\dfrac{1}{\cos(x)} - \cos(x) = \dfrac{1}{\cos(x)} - \dfrac{\cos(x) \cos(x)}{\cos(x)} = \dfrac{1-\cos^2(x)}{\cos(x)}$

Remember that

$\sin^2(x) + \cos^2(x) =1 \implies 1- \cos^2(x) =\sin^2(x)$

Therefore,

$\dfrac{1-\cos^2(x)}{\cos(x)} = \dfrac{\sin^2(x)}{\cos(x)} = \dfrac{\sin(x)\sin(x)}{\cos(x)}$

Once

$\dfrac{\sin(x)}{\cos(x)} = \tan(x)$

Then,

$\dfrac{\sin(x)\sin(x)}{\cos(x)} = \sin(x)\tan(x)$

Hence, it is proved

5 0

3 years ago

What is the following fraction in simplest form 4/16

ladessa [460]

Answer:

1/4

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Please help me this is due today

Serjik [45]

Answer:

1. 15 (A)

2. 12 (G)

Step-by-step explanation:

1. We can make an equation out of this...

3x+3=48

x is the age of Geoff which is what we are trying to find out

We have to add 3 to both sides of the equation

3x+3=48

-3 -3

________

we end up with 3x=45

we then have to divide 3 by both sides because its the opposite of

multipling

3x=45

_____

we get x=15

2. We can write a problem statement

(2 x 9)-6=?

multiply 2 and 9 <u>FIRST</u>

18-6=?

your answer is 12

Your Welcome! Have a great rest of your day! :)

7 0

3 years ago

Evelyn packed this box with 1-inch cubes. Which expression does NOT show how Evelyn can find the volume of the box?

gregori [183]

Answer:

2+3+6 is the incorrect expression

8 0

3 years ago

A number is divisible by 6 if and only if it is divisible by 3.

olga55 [171]

The answer would be D

4 0

3 years ago