2 years ago

Express the sum or difference as a product: cos 4x - cos 6x

Mathematics

1 answer:

Jobisdone [24]2 years ago

3 0

Cos -2x or -cos2x, it's the difference.

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Find the measure for angle

I am Lyosha [343]

Answer:

add both of those up and see what you get

Step-by-step explanation:

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2 years ago

Yesterday, Eddy ran 26.2 miles.

Romashka [77]

Answer:

Step-by-step explanation:

10% of 26.2 miles = 0.10×26.2 miles = 2.61 miles

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2 years ago

Write the quadratic equation whose roots are -4 and -1 and whose leading coefficient is 2

EleoNora [17]

Answer:

Below

Step-by-step explanation:

here is the factored form of a quadratic equation :

f(x) = a ( x +/- n ) ( x +/- n )

We can just plug in what we know into this form :

f(x) = 2 ( x + 4 )( x + 1 )

If you were to plug this into desmos it will show you the graph!

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2 years ago

Find the value of the variables. If your answer is not an integer, leave it in simplest radical form.

stepladder [879]

We know that we can use trigonometry to solve for x here.

If we use tangent, we can solve for x directly:

$tan(theta)=\frac{opposite}{adjacent}$

$tan(60)=\frac{x}{6}$

$6*tan(60)=x$

$x=6\sqrt{3}$

So therefore we have solve for x, which is D) $6\sqrt{3}$ .

4 0

2 years ago

NOTE: Angles not necessarily drawn to scale.

jeka57 [31]

Answer:

x = 45°

Step-by-step explanation:

Vertical Angle Theorem

When two straight lines intersect, they form two pairs of angles. The vertically opposite (non-adjacent) angles are congruent (equal).

From inspection of the given diagram, the straight line with points C and D and the straight line with points F and G intersect at point E.

Therefore, angles ∠FEC and ∠DEG are vertically opposite, and so they are equal.

From inspection of the diagram:

∠FEC = x°
∠DEG = 20° + 25° = 45°

Therefore:

⇒ ∠FEC =∠DEG

⇒ x = 45°

6 0

1 year ago