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elena-s [515]
3 years ago
11

Use the relationship between the sine and cosine functions to fill in each blank .

Mathematics
1 answer:
rjkz [21]3 years ago
8 0

Answer:

sin(12°)

Step-by-step explanation:

Because sine and cosine are cofunctions, we can use the relation sin(90° - θ) = cosθ to show that cos(78°) = sin(90° - 78°) = sin(12°)

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Lady bird [3.3K]

Answer:

the parabola can be written as:

f(x) = y = a*x^2 + b*x + c

first step.

find the vertex at:

x  = -b/2a

the vertex will be the point (-b/2a, f(-b/2a))

now, if a is positive, then the arms of the parabola go up, if a is negative, the arms of the parabola go down.

The next step is to see if we have real roots by using the Bhaskara's equation:

x =  \frac{-b +-\sqrt{b^2 -4ac} }{2a}

Now, draw the vertex, after that draw the values of the roots in the x-axis, and now conect the points with the general draw of the parabola.

If you do not have any real roots, you can feed into the parabola some different values of x around the vertex

for example at:

x =  (-b/2a) + 1 and x =  (-b/2a) - 1

those two values should give the same value of y, and now you can connect the vertex with those two points.

If you want a more exact drawing, you can add more points (like x =  (-b/2a) + 3 and x =  (-b/2a) - 3) and connect them, as more points you add, the best sketch you will have.

8 0
2 years ago
Please help me with this. I will give brainliest.
Temka [501]

Answer:

do you still need this answered?

Step-by-step explanation:

7 0
2 years ago
Umm.. Hi there! Can someone please help me out with this? (only for those who know the answer)
nignag [31]

Answer:

The Exterior Angle of triangle LDR is angle d. The Remote Interior Angles are a and b.

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Explanation:

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The <u>exterior angle</u> is the angle, made by the side of the shape and a line drawn out from an adjacent side.

I hope this helps!

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3 years ago
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Answer:

Where is the picture? I can help

Step-by-step explanation:

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3 years ago
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Pani-rosa [81]
Usually you would have two to add, are you sure this is complete? If this is it then all you do is w-8w, which is -7w. 
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3 years ago
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