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hram777 [196]
3 years ago
11

How to prove it's an identity sin y + sin 3y + sin 5y + sin 7y = 4 cos y cos 2y sin 4y

Mathematics
1 answer:
Gennadij [26K]3 years ago
7 0

Answer:

0.9777102203

Step-by-step explanation:

the identity is 0.9777102203

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Mark got 20% raise for his salary. If this salary was $1800 what is the new salary
elena-14-01-66 [18.8K]
Salutations!

Mark got 20% raise for his salary. If this salary was $1800 what is the new salary?

So lets solve this!

Mark got 20% "raise" for his salary. It clearly indicates that it is percentage of increase, so therefore, after solving out all the sum, we would be adding up 1800 to get the total of the new salary.

Lets form this into statements ----

Percentage increase = 20%

Mark's old salary = $1800

Mark's new salary = 20 × 1800/100

Cancel out the zeros to make it more logical ----

20 × 18/1

= 360.

Now, we need to add 1800 and 360 to get Mark's new salary

1800 + 360 = $2160.

Mark's new salary is $2160.

Hope I helped :D


7 0
3 years ago
PLEASE ANSWER THIS ALGEBRA QUESTION ILL MARK YOU BRAINLIEST
anyanavicka [17]

Answer:

a

Step-by-step explanation:

7 0
3 years ago
.5+y-5÷34+3×7 -6 =45​
Minchanka [31]

Answer:

y=2205

Step-by-step explanation:

5+y-5/34+3*7-6=45

combine terms on each side

y/49=45

multiply 49 on each side

y=2205

i hope this helps you

7 0
3 years ago
Read 2 more answers
Solve equation 3 - 8c = 35
NeTakaya

We would subtact 3 from both sides allowing the equation to simplify to -8c=32

We would then divide both sides by -8 to equal -4

The final answer C=-4

5 0
3 years ago
Find the geometric mean between each pair of numbers.40 and 15
kirill [66]

Given a N quantity of numbers, the Geometric Mean is equal to the N-th root of product of the N numbers

In this case, we have two numbers, then we need to multiply them and take square root:

\sqrt{40\cdot15}=\sqrt[]{600}=\sqrt[]{100\cdot6}=\sqrt[]{100}\cdot\sqrt[]{6}=10\sqrt[]{6}

The answer is:

10√6

Rounded is Approximately 24.5

8 0
1 year ago
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