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faltersainse [42]
3 years ago
13

PLEASE HELPP URGENT 20 points!!!

Mathematics
1 answer:
MAVERICK [17]3 years ago
8 0
If you're talking about the second part of the question where it asks you which facts you included in your answer, you can choose any of them and it will be counted right.
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If cos(θ)=2853 with θin Q IV, what is sin(θ)?
marysya [2.9K]

Answer: \sin \theta=\frac{-45}{53}

Step-by-step explanation:

Since we have given that

\cos\theta=\frac{28}{53}

And we know that θ is in the Fourth Quadrant.

So, Except cosθ and sec θ, all trigonometric ratios will be negative.

As we know the "Trigonometric Identity":

\cos^2\theta+\sin^2\theta=1\\\\\sin \theta=\sqrt{1-\cos^2\theta}\\\\\sin \theta=\sqrt{1-(\frac{28}{53})^2}=\sqrt{\frac{53^2-28^2}{53^2}}\\\\\sin \theta=\sqrt{\frac{2025}{53^2}}\\\\\sin \theta=\frac{45}{53}

It must be negative due to its presence in Fourth quadrant.

Hence, \sin \theta=\frac{-45}{53}

7 0
3 years ago
3x -2y = -6 and y = x+5
sweet [91]

Answer:

x = 4, y = 9.

Step-by-step explanation:

3x -2y = -6 and y = x+5

Substitute y = x + 5 in the first equation:

3x - 2(x + 5) = -6

3x - 2x - 10 = -6

x = -6 + 10

x = 4

So y = 4 + 5 = 9.

5 0
3 years ago
6) 3:7 = 15:45. True OR False?
-Dominant- [34]

Answer:

False

Step-by-step explanation:

to get from 3 to 15, you multiply by 5

So theoretically, if you multiply 7 and 5, you should get the other missing value.

7 x 5 ≠ 45

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

7 0
3 years ago
Use an inequality symbol to compare -3 + 7 ____-10 -2​
Tamiku [17]

Answer:

>

Step-by-step explanation:

-3 + 7 = 4

-10 - 2 = -12

4 > -12

7 0
3 years ago
If Q(x) = x2 + 3x + 2, find Q(-4).
lord [1]

Q(x)=x^2+3x+2

\\ \sf\longmapsto Q(-4)

\\ \sf\longmapsto (-4)^2+3(-4)+2

\\ \sf\longmapsto 16+(-12)+2

\\ \sf\longmapsto 16-12+2

\\ \sf\longmapsto 4+2

\\ \sf\longmapsto 6

3 0
3 years ago
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