Answer:
is an even function.
Step-by-step explanation:
Recall when it means when a function is even or odd. An even function has the following property:

And an odd function has the following property:

So, let's test some values for cos(x).
Let's use π/3:

From the unit circle, was can see that this is 1/2 (refer to the x-coordinate).
Now, let's find -π/3. This is the same as 5π/3. Thus:

And again from the unit circle, we can see that this is 1/2.
Therefore, despite the negative, the function outputs the same value.
Cosine is an even function.
Notes:
Cosine is an even function and sine is an odd function. It's helpful to remember these as they can help you solve some trig problems!
Yes, but your answer will be a decimal, but make sure you check your work and one way you can check your work is by first combing like terms, and then solve it as it is an equation.
Answer:
568,000L
Step-by-step explanation:
1 Kiloliter = 1,000 Liters
568 x 1,000 = 568,000
Answer:
<h2>43.3cm²</h2>
Step-by-step explanation:
Area of a Triangle = Base * Height * 1/2
Base = 5
Height = 4.33
Area of a Triangle = 5 * 4.33 * 1/2
Area of a Triangle = 10.825
There are four triangles.
Surface Area = Area of a Triangle * Number of Triangles
Surface Area = 10.825 * 4
Surface Area = 43.3cm²