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Jet001 [13]
4 years ago
6

Help Please! If tan θ = 20/21, what is cos θ?

Mathematics
1 answer:
g100num [7]4 years ago
4 0

We can use SOH CAH TOA.

We know that the legs, being Opposite and Adjacent, are 20 and 21. Using Pythagorean Theorem, we see the Hypotenuse is 29.

Then, using Adjacent over Hypotenuse, we know cos θ = 21/29.

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Rhett decides to build a square room for his movie and music collection. If the area of the room is 4x2 28x 49 square feet, what
ioda

The length of one side of the square room of Rhett for his movie and music collection is (2x+7) feet.

<h3>What is area of square?</h3>

Area of square is the square of its sides length. It can be given as,

A=a^2

Here, a is the length of the side of the square

Rhett decides to build a square room for his movie and music collection. The area of the room is given by the polynomial equation as,

A=(4x^2 +28x +49)\rm ft^2

Find the factors of the above equation using the split the middle term method as,

A=4x^2 +28x +49\\A=4x^2 +14x+14x +49A=x(2x+7)+7(2x+7)\\A=(2x+7)(2x+7)\\A=(2x+7)^2\rm ft^2

Compare it with the area of the square we get,

a=(2x+7)\rm ft

Hence, the length of the square room of Rhett for his movie and music collection is (2x+7) feet.

Learn more about the area of square here;

brainly.com/question/1658516

6 0
3 years ago
Sin (45°) * cos (30°) + cos (45°) sin (30°) = ?
quester [9]

\frac{ \sqrt{2}  +  \sqrt{6} }{4}

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3 years ago
Which of the following expressions represents the solution to the inequality statement?
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Answer is <span>x ≥ 7

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Answer my question #4
Vinil7 [7]

Answer:

11. 432,500 12. KF & ND

Step-by-step explanation:

11.

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( it says "about" so it doesn't have to be exact but a reasonable guess)

12. The two stadiums most similar in attendance is Kyle Field and Notre Dame

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HELP ITS URGENT PLS I GIVE POINTS​
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The answer is x = 60 degrees
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