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patriot [66]
4 years ago
15

Which of the following is equivalent to cos x?

Mathematics
1 answer:
Otrada [13]4 years ago
3 0

ANSWER

D) sin Y

EXPLANATION

The given triangle is a right triangle.

This implies that that:

x + y = 90 \degree

Then we have

y= 90 - x

Recall that

\cos(x)  =  \sin(90 - x)

But

90 - x = y

When we do the substitution, we get,

\cos(x)  =  \sin(y)

Therefore cos(x) is a equivalent to sin(y).

The correct answer is D.

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Given:

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x+y=4.25

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To find:

The solution of given system of equations.

Solution:

We have,

x+y=4.25           ...(i)

16.90x+4y=36.35           ...(ii)

Multiply equation (i) by 4.

4x+4y=17           ...(iii)

Subtracting (iii) from (ii), we get

16.90x+4y-(4x+4y)=36.35-17

16.90x+4y-4x-4y=19.35

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x=\dfrac{19.35}{12.90}

x=1.5

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1.5+y=4.25

y=4.25-1.5

y=2.75

The solution of system of equations is x=1.5 and y=2.75. It means, the yards of silk are 1.5 and yards of cotton are 2.75.

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3 years ago
Please help me with any of the questions
Svetlanka [38]
1.) There are 6 numbers you can roll on a standard dice: 1, 2, 3, 4, 5, 6
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The chances of getting an even sum are much higher which is why you should choose even.

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Answer:

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Answer:

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