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faust18 [17]
4 years ago
7

If A+B+C=π prove that sinA+sinB+sinC=4cosA/2 cosB/2 cosC/2​

Mathematics
1 answer:
iris [78.8K]4 years ago
6 0

Answer:

oyo archer comes here in answer your real answer it is 7 divided by 7 divided / 2 / to the answer X to other words if you're into Google with answers in churches of students

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Write as a product of two polynomials. a(b–c)+d(c–b)
Natasha2012 [34]

The product of two polynomial is (b - c)(a - d)

Step-by-step explanation:

Let us explain the meaning of polynomial

A polynomial is an expression consisting of:

  • Variables
  • Coefficients
  • Involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables

∵ a(b - c) + d(c - b)

∵ We need to write it as a product of two polynomials

- That means factorize it to have two brackets multiplied by

   each other and each one has 2 terms

∵ The bracket (c - b) can be written as (-b + c)

- Take (-1) as a common factor from the bracket (-b + c)

∵ -b ÷ (-1) = b

∵ c ÷ (-1) = -c

∴ (-b + c) = - (b - c)

- Substitute it in the expression above

∴ a(b - c) + d(c - b) = a(b - c) + d(-1)(b - c)

∵ d(-1) = -d

∴ a(b - c) + d(c - b) = a(b - c) - d(b - c)

Let us factorize the expression a(b - c) - d(b - c)

The bracket (b - c) is a common factor of the two terms

∵ (b - c) is a common factor of the two terms of the expression

∵ a(b - c) ÷ (b - c) = a

∵ - d(b - c) ÷ (b - c) = - d

∴ a(b - c) - d(b - c) = (b - c)(a - d) ⇒ product of 2 polynomial

The product of two polynomial is (b - c)(a - d)

Learn more:

You can learn more about factorization in brainly.com/question/7932185

#LearnwithBrainly

4 0
4 years ago
Answer pleaseeee ASAP
MrMuchimi

Answer:

93 square metres

Step-by-step explanation

The formula for surface area is 2ab+2ac+2bc, and with no lid one bc can be removed.

Suppose a=7 b=3 and c=3

2(7x3)+2(7x3)+(3x3)=93

3 0
3 years ago
Helllllllllllllllllp
Nonamiya [84]

Answer:

63.78

Step-by-step explanation:

That should be the answer I hope you have a great day! I calculated a little, got that answer.

4 0
3 years ago
A) Sam left Plow Cay in his boat at 8 a.m. He arrived at Bay Cay at 11:30 a.m. How long was his trip?
dimaraw [331]
I dont know the answer
8 0
3 years ago
Solve the system by substitution.<br> y = 3x + 14<br> y = X
lys-0071 [83]

Answer:

\boxed{x = -7~~and~~ y =-7}

Step-by-step explanation:

y = 3x + 14

y = x

.

x = 3x + 14

3x - x = -14

2x = -14

x = \frac{-14}{2}

x = -7

.

y = x

y = -7

4 0
3 years ago
Read 2 more answers
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