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arlik [135]
3 years ago
10

Which expression is equivalent to cos(3x) sin x?

Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
7 0

Answer:

Step-by-step explanation: I tried all the other options and this was the only correct one for me on Edmentum.

LuckyWell [14K]3 years ago
4 0

Answer:

\frac{1}{2} [sin(4x)-sin(2x)]

Step-by-step explanation:

Use the Product-Sum identity to turn cos(3x) sin x into a sum.

Formula: cos(u) + sin(v) = \frac{1}{2}[sin(u+v)-sin(u-v)]

Plug 4x and 2x for u and v into the formula: \frac{1}{2}[sin(3x+x)-sin(3x-x)]

Simplify: \frac{1}{2}[sin(4x)-sin(2x)]

:)

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s d(f(x))dx=f′(x) and g’ means d(g(x))dx = g′(x) .

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Which function is a quadratic function? a(x) = –2x^3 + 2x – 6 b(x) = 5x^3 + 8x^2 + 3 c(x) = –8x^2 + 3x – 5 d(x) = 6x^4 + 2x – 3
Sedaia [141]

Answer:

c(x) = –8x^2 + 3x – 5 is a quadratic

Step-by-step explanation:

A quadratic function involves the 2nd power of x:  x^2, and may (or may not) involve the 1st and zeroth power of x.

a(x) = -2x^3 is not a quadratic because of that exponent 3; in a quadratic, the highest power is always 2.

b(x) = 5x^3 + 8x^2 + 3 is not a quadratic for the same reason that a(x) is not a quadratic.

c(x) = –8x^2 + 3x – 5 is a quadratic:  the highest power of x is x^2, the other powers are x^1 and x^0.

5 0
4 years ago
Need help asap rocky :))
antoniya [11.8K]

The value of ∠EOF is 75°.

Step-by-step explanation:

Let us take O be the center of the circle.

Given,

∠AOB = 45°

∠COD = 60°

To find the ∠EOF (value of x)

Now,

Since AD is the diameter of the circle, ∠AOD = 180°

∠AOB+∠COD+∠BOC = ∠AOD

Or, 45°+60°+∠BOC = 180°

or, ∠BOC  = 180°-(45°+60°)

= 75°

Again,

∠BOC  = ∠EOF as they are vertically opposite angle.

Hence,

∠EOF = 75°

4 0
3 years ago
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