All categories

3 years ago

I need an answer to this asap... please ....just number 3

Mathematics

2 answers:

Agata [3.3K]3 years ago

7 0

Answer:

hence cos ( 2 A ) = cos 2 A − ( 1 − cos 2 A ) = 2 cos 2 A − 1

Step-by-step explanation:Well we know that for two angles A , B

it holds that cos ( A + B ) = cos A cos B − sin A ⋅ sin B hence for A = B you get cos ( 2 A ) = cos 2 A − sin 2 A But sin 2 A = 1 − cos 2 A

SIZIF [17.4K]3 years ago

3 0

Answer:

is writing an answer

Step-by-step explanation:

You might be interested in

Quick algebra 1 question for 10 points!

julia-pushkina [17]

B because the amount of money they earn per hour multiplied by how many hours they worked is equal to what they earned in total

7 0

2 years ago

A number increased by 100% and decreased by 20% is x. what is the number ? NEEDED TODAY

vodka [1.7K]

Answer:

Let's assume the number be 100.

According to the problem , 100 is increased by 100%.

So, new number will be 100+100=200

Now 200 will decreased by 20%.

So, 20% of 200= 0.20*200= 40.

So, again the number has been changed into 200+40=240.

So, x=240

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Si el valor de entrada es el nombre y el valor de salida es la letre con la que empieza

kiruha [24]

Answer:

lol warknvvfjbvbbvcbb

3 0

3 years ago

A teacup has a radius of 1 inch. What is the teacup's diameter?

vaieri [72.5K]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Factorise the following.

zepelin [54]

Answer:

Step-by-step explanation:

i). $\frac{48a^3}{6a}=\frac{6\times 8\times a\times a^2}{6a}$

$=\frac{6a}{6a}\times 8a^2$

= 8a²

ii). $\frac{72a^3b^4c^5}{8ab^2c^3}$ = $\frac{8\times 9\times a\times a^2\times b^2\times b^2\times c^2\times c^3}{8ab^2c^3}$

= $\frac{8ab^2c^3}{8ab^2c^3}\times 9a^2b^2c^2$

= 9a²b²c²

8 0

3 years ago