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3 years ago

Start and arguement in the comments LOL

Mathematics

1 answer:

lys-0071 [83]3 years ago

7 0

Answer:

Bro u need to shu.t up all ready

Step-by-step explanation:

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Round 218 to the nearest ten

g100num [7]

Rounding 218 ⇒ 220.

Hoped this helped.

~Bob Ross®

6 0

3 years ago

Read 2 more answers

PLs HeLP !!! multiply (-8) x 11

DochEvi [55]

Answer:

-88

Step-by-step explanation:

11*8=88 put the negative sign with it and you get -88

8 0

3 years ago

Read 2 more answers

The probability that Hank Aaron hits a home run on any given at-bat is 0.14, and

Liula [17]

Answer:

Step-by-step explanation:

3 0

3 years ago

Futhe Mathematics <img src="https://tex.z-dn.net/?f=%28Cos%20%7B%7D%5E%7B4%7Dt%20-Sin%20%7B%7D%5E%7B4%7Dt%20%29%20%20%5Cdiv%2

Nastasia [14]

Answer:

cos2t/cos²t

Step-by-step explanation:

Here the given trigonometric expression to us is ,

$\longrightarrow \dfrac{cos^4t - sin^4t }{cos^2t }$

We can write the numerator as ,

$\longrightarrow \dfrac{ (cos^2t)^2-(sin^2t)^2}{cos^2t }$

Recall the identity ,

$\longrightarrow (a-b)(a+b)=a^2-b^2$

Using this we have ,

$\longrightarrow \dfrac{(cos^2t + sin^2t)(cos^2t-sin^2t)}{cos^2t}$

Again , as we know that ,

$\longrightarrow sin^2\phi + cos^2\phi = 1$

Therefore we can rewrite it as ,

$\longrightarrow \dfrac{1(cos^2t - sin^2t)}{cos^2t}$

Again using the first identity mentioned above ,

$\longrightarrow \underline{\underline{\dfrac{(cost + sint )(cost - sint)}{cos^2t}}}$

Or else we can also write it using ,

$\longrightarrow cos2\phi = cos^2\phi - sin^2\phi$

Therefore ,

$\longrightarrow \underline{\underline{\dfrac{cos2t}{cos^2t}}}$

And we are done !

$\rule{200}{4}$

Additional info :-

Derivation of cos²x - sin²x = cos2x :-

We can rewrite cos 2x as ,

$\longrightarrow cos(x + x )$

As we know that ,

$\longrightarrow cos(y + z )= cosy.cosz - siny.sinz$

So that ,

$\longrightarrow cos(x+x) = cos(x).cos(x) - sin(x)sin(x)$

On simplifying,

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

Hence,

$\longrightarrow\underline{\underline{cos (2x) = cos^2x - sin^2x }}$

$\rule{200}{4}$

7 0

3 years ago

Use the base example of two people walking to describe a system of two linear equation has i.) 0 solution 2) 1 solution 3) an in

sveta [45]

The system has:

No solutions for two parallel lines.
1 solution for two nonparallel lines.
Infinite solutions for two equations that describe the same line.

<h3>How to identify the number of solutions for the systems?</h3>

A system of two linear equations is given by:

y = a*x + b

y = c*x + d

1) The system has no solutions when both lines are parallel lines, this happens when both lines have the same slope and different y-intercept.

y = a*x + b

y = a*x + d

2) The system has one solution when the lines have different slopes:

y = a*x + b

y = c*x + d

3) The system has infinite solutions when both equations describe the same line:

y = a*x + b

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

7 0

2 years ago