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Stels [109]
2 years ago
15

Which pair of angles has congruent values for the sin x° and the cos y°?

Mathematics
2 answers:
Ronch [10]2 years ago
6 0

Answer:

35°; 55°

Step-by-step explanation:

Suppose,

\sin x=\cos y

\sin x = \sin (90-y)      (\because \cos \theta = \sin (90-\theta))

\implies x = 90 - y

\implies x + y = 90

Hence, x and y must be complementary angles.

∵ 35° + 55°  = 90°

35° +  145°  = 180° ≠ 90°

35° + 70°  = 105° ≠ 90°

35° +  35° = 70° ≠ 90°

Therefore, the pair of angles would be 35°; 55°.

Lesechka [4]2 years ago
5 0
This one is A. they are complementary
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Which set of ordered pairs is not a direct variation?
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The first option is not a direct variation

Step-by-step explanation:

When we talk of a direct variation, as one value increases, the other value increases too

Or as one value decreases, the other value decreases

A direct variation is of the form;

y = kx

k = y/x

where k is the coefficient of variation that must be a constant value all through the set of values

The values we are comparing here are the x and y values

So

let us take a look at the options;

The first option is not a direct variation

For the first option, the rate of increase is not constant;

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for the second;

the ratio is 1 to 1

for the third;

3/6 = 1/2 ; 6/12 = 1/2; 9/18 = 1/2

for the fourth;

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8 0
2 years ago
Given that ABCD is a rhombus, what is the value of x?
SashulF [63]

Answer:

B

Step-by-step explanation:

A rhombus is divided into four congruent triangles. The two given angles are complementary, meaning they add up to 90 degrees. Set up an equation:

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5x-25=90   Combine like terms

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(- 5x + 3y) (2x – 12y + 1)<br> Multiply
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The answer for this problem i −10x2+66xy−36y2−5x+3y

Let's solve it by step by step.

(−5x+3y)(2x−12y+1)

=(−5x+3y)(2x+−12y+1)

=(−5x)(2x)+(−5x)(−12y)+(−5x)(1)+(3y)(2x)+(3y)(−12y)+(3y)(1)

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So, -10x2+66xy-36y2-5x+3y

If this didn't help you, you can also use blocks to help!

©HWsolver in brainly.com

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