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

8. What is the value of x?

xeze [42]

Answer:

I believe that x is equal to 10

Step-by-step explanation:

3 0

2 years ago

Fiona spent $13.70 to travel across the city in a taxi. It cost her $3.25 to get the taxi and $2.75 each mile she traveled. Writ

Goryan [66]

$2.75m+3.25=13.70$

$2.75m=13.70-3.25\\\\2.75m=10.45\ \ \ /:2.75\\\\m=\frac{10.45}{2.75}\\\\m=\frac{1045}{275}\\\\m=3.8\ (miles)$

8 0

3 years ago

Read 2 more answers

Any one know the answer for this question??????

Romashka [77]

Answer:

C) y > 0

Step-by-step explanation:

I graphed it

7 0

2 years ago

Susan runs 22 km in 2 hours and 45 minutes. What is her average speed in km an hour? Explain your answer please!

Tpy6a [65]

Answer:

22km= 2 hours and 45 mins

To find speed: Distance/Time

22/2.75 = 8

Your answer 8km/h

Step-by-step explanation: When finding speed, the formula is always distance divided by time. 45 minutes of 60 minutes is 3/4 of an hour, and 3/4 is 0.75 is decimal. So you add the 2 + .75, and you'll get 2.75. After you convert the time, you begin dividing and you'll get your answer!

4 0

3 years ago

-1/2 w -3/5= 1/5w<br><br> W=

Vinil7 [7]

The exact form is: w = -6/7

8 0

3 years ago