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inessss [21]
3 years ago
7

Sin8x=8sinxcosxcos2xcos4x proving trig identity?

Mathematics
1 answer:
weeeeeb [17]3 years ago
7 0
sin 8 x = 2 sin 4x  cos 4x =
= 2 * 2  sin 2x  cos 2x  cos 4 x =
= 4 * 2  sin x  cos x  cos 2x  cos 4x =
= 8  sin x  cos x  cos 2x  cos 4x    ( correct )  
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8:3 is the correct answer
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4 years ago
Rearrange the following formula to make c the subject.<br><br> a= b/c + 5
zloy xaker [14]

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1

cachemirisufyan

Experto

168 respuestas

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2a + 2c = 5a - 5b

recopilar términos ligeros.

toma 2a en el otro lado

2c = 5a -2a-5b

2c = 3a - 5b

divide 2c's 2 en ambos lados

y

c = (3a - 5b) / 2

dar un más inteligente por favor. tnx que tengas un buen día.

5 0
3 years ago
Write a division expression that has a negative solution.​
Anon25 [30]

Answer:

3/-3=-1

Step-by-step explanation:

any number divided by a negative number gives a negative answer

8 0
3 years ago
Pls help me i have a min to finish pls I’ll make brainliest
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answer:

it is not proportional.

step-by-step explanation:

14-10.50=3.5

17.50-14=3.5

24.50-17.50=7

in order for it to be proportional, they would all have to equal the same number and since in this case, they don't it is non-proportional

hopefully, this helps :)

have a nice day !!

i'm extremely sorry i couldn't help sooner :(

4 0
3 years ago
Multiply the following and provide the product in standard from thank you
LekaFEV [45]

Answer:

x^3 + 4x^2 - 7x - 10

Step-by-step explanation:

To solve this we're going to use Polynomial multiplication, starting by multiplying (x-2)(x+1) = x^2 - 2x + x - 2 = x^2 - x - 2. Next, we will multiply (x^2 - x - 2)(x+ 5) = x^3 + 5x^2 -x^2 - 5x -2x -10 = x^3 + 4x^2 - 7x - 10.

8 0
3 years ago
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