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3 years ago

Find COS

Mathematics

1 answer:

ehidna [41]3 years ago

6 0

$\frac{9}{41}$

Step-by-step explanation:

The ratio cosine tell us that

In a right angled triangle, the cosine of an angle is the side adjacent to the angle divided by the hypotenuse of the triangle.

In other words,

$\cos(x) = \frac{adj}{hyp}$

The side adjacent to angle a is 9. The hypotenuse is 41.

$\cos(a) = \frac{9}{41}$

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What's the length of side b in the figure below? I posted a picture so you can view the actual problem. Please help.

svetoff [14.1K]

we know that

in the right triangle of the figure

Applying the Pythagorean Theorem

$13^{2} =b^{2} +7^{2} \\ b^{2} =13^{2}-7^{2}\\ b^{2}=120\\ b=\sqrt{120} \ cm$

therefore

the answer is the option

C) $b=\sqrt{120} \ centimeters$

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3 years ago

Read 2 more answers

-0.55 inches, 0.75 inches, 3.25 inches, -0.75 inches, and 0.7 inches.

aleksandrvk [35]

Answer:

3.25 inches, 0.75 inches, 0.7 inches, -0.55 inches, -0.75 inches

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3 years ago

Gerardo says that a cube with edges that measure 10 centimeters has a volume that is twice as much as a cube with sides that mea

irga5000 [103]

He is wrong.
The 10 inch cube is bigger than the 5 inch cube by 5 cm in EACH DIRECTION.
So, the 10 inch cube should be twice as big in volume by a factor of 2*2*2
=8
Okay let's see.
5 cm cube volume = 5*5*5 = 125 cc
10 cm cube volume = 10 * 10 * 10 = 1,000 cc

1,000 / 125 = 8

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3 years ago

Find the GCF (greatest common factor) of 8 and 7.

FrozenT [24]

Answer: Its 1

Step-by-step explanation:

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3 years ago

Select the polynomial that is a perfect square trinomial.

Alina [70]

Answer:

16x^2 -8x +1

Step-by-step explanation:

The square of a binomial expands as ...

(a +b)^2 = a^2 +2ab +b^2

So, you need to look for a trinomial with first and last terms that are perfect squares and a middle term that is double the product of the roots of those terms.

This pattern matches ...

16x^2 -8x +1 = (4x -1)^2

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3 years ago