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____ [38]
4 years ago
12

What’s the value of x???

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
5 0

Answer:

12

Step-by-step explanation:

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Cos2A is equivalent to: A. sin2A−cos2A B. sin2A+cos2A C. cos2A−sin2A D. cosA−sinA
valina [46]

Formatted Options:

A. sin²A−cos²A

B. sin²A+cos²A

C. cos²A−sin²A

D. cosA−sinA

Answer:

C. cos²A−sin²A

Step-by-step explanation:

From the double angle formulas, we know that:

cos (A + B) = cosAcosB - sinAsinB

So, if B = A, then the above equation becomes;

cos(A + A) = cosAcosA - sinAsinA      [i.e replacing B with A]

=>cos(2A) = (cosA)² - (sinA)²

=> cos(2A) = cos²A - sin²A

Therefore,

cos(2A) is equivalent to cos²A - sin²A

6 0
3 years ago
Examine the system of equations. −5x 5y = 40 4x 3y = 24 What is the solution? ( , ).
Elden [556K]

A system of equation is the set of equation in which the finite set of equation is present for which the common solution is sought.

The solution of the equation is (0,8)

<h3>What is system of equation?</h3>

A system of equation is the set of equation in which the finite set of equation is present for which the common solution is sought.

Given information-

The first equitation given in the problem is,

-5x+5y = 40

Divide both side of the above equation with 5 as,

\dfrac{(-5x+5y )}{5}= \dfrac{40}{5}\\-x+y=8\\y=8+x          .......1

Let the above equation as equitation 1.

The first equitation given in the problem is,

4x+ 3y = 24

Put the value of <em>y</em> form the equation 1 in the above equation as,

\begin{aligned}4x+ 3(x+8) &= 24\\4x+ 3x+24 &= 24\\4x+ 3x &= 24-24\\7x&=0\\x&=0\\\end

Put the value of <em>x</em> in the equation one as,

y=8+0\\y=8          

Thus the solution of the equation is (0,8)

Learn more about the system of equations here;

brainly.com/question/13729904

3 0
3 years ago
Ok but the fact that the d'amelios had to cheat in trivia when they already had an advantage of 4x brain power proves that tikto
jok3333 [9.3K]
You are right don’t worry
7 0
3 years ago
Read 2 more answers
What is value of the 8 in 325,785,901
Inessa [10]
Ten thousands

if you're speaking of place value?
6 0
3 years ago
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Whats 1,112438 rounded to the nearesten thousands
rodikova [14]

Answer:

1,112,438 becomes 1,112,000

8 0
3 years ago
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