All categories

3 years ago

Please help!!! Which is not equal to the others?

Mathematics

1 answer:

svetlana [45]3 years ago

7 0

Answer:

Step-by-step explanation:

Given

a cos2x

2sinxcosx = sin2x

2cos²x - 1 = cos2x

1 - 2sin²x = cos2x

b is the expression not equal to the others

---------------------------------------------------------------------------

Note

cos2x = cos²x - sin²x = cos²x - (1 - cos²x) = 2cos²x - 1

cos2x = (1 - sin²x) - sin²x = 1 - 2sin²x

You might be interested in

How many cubes are needed to build the base of this structure? A.6 B.3 C.5 D.4

melomori [17]

Answer: C.5

The answer is 5.

Why is there a twenty character minimum on brainly? what a stupid idea

3 0

3 years ago

Read 2 more answers

I need help with number 2

horrorfan [7]

Answer:

Slope= 0.20

Y-intercept=12.50

Equation= Y=0.20+12.50

Step-by-step explanation:

6 0

3 years ago

Verify the identity cos ( x + pi/2) = -sin x

IgorLugansk [536]

Hello
cos ( x + pi/2) =cos(x)cos(pi/2)-sin(x) sin(pi/2)
= cos(x)×0-sin(x) ×1
cos ( x + pi/2) = - sin(x)

3 0

3 years ago

Read 2 more answers

Find the product. (2xyz) (-4x2yz) PLEASE HELP!!! ASAP!!!

melamori03 [73]

Answer:

$-16x^{2} y^{2}z^{2}$

Step-by-step explanation:

Let's calculate the answer to the second parenthesis. Just multiply throughout to get -8xyz. Then, multiply the first parenthesis by the second. Multiply the constants (-8 and 2) first to get -16, multiply the x's together to get x^2, the y's together to get y^2, and the z's together to get z^2. Put it all together to get $-16x^{2} y^{2}z^{2}$ .

6 0

3 years ago

Read 2 more answers

Help please !! The graph of the invertible function f is shown on the grid below.

vivado [14]

Answer:

Step-by-step explanation:

→ We go up the y axis to 6 and read of the x coordinate which is 4. This is because an inverse function does the the opposite i.e. if f ( x ) = y

f⁻¹ ( y ) = x.

4 0

2 years ago