3 years ago

Show that sin( + 180°) + 2 cos( − 360°) − sin( − 180°) = 2x

1 answer:

8 0

Answer:

Example 1: Change sin 80° cos 130° + cos 80° sin 130° into a trigonometric function in ... Example 2: Verify that cos (180° − x) = − cos x ... Example 7: Verify that sin (360° − x) = − sin x.

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Graph the equation. y=3(x+1)^2-2 <br> HELP!!

charle [14.2K]

Answer:

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Step-by-step explanation:

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3 years ago

Marta is solving the equation s=2πrh+2πr^2 for h. which should be the result?

Marta_Voda [28]

Answer: First option.

Step-by-step explanation:

Marta needs to subtract $2\pi r^2$ from both sides of the equation:

$s=2\pi rh+2\pi r^2$

$s- 2\pi r^2=2\pi rh+2\pi r^2- 2\pi r^2$

$s- 2\pi r^2=2\pi rh$

Now she needs to divide both sides of the equation by $2\pi r$ , then:

$h=\frac{s- 2\pi r^2}{2\pi r}$

Rewriting:

$h=\frac{s}{2\pi r}-\frac{2\pi r^2}{2\pi r}$

Simplifying, she should get:

$h=\frac{s}{2\pi r}-r$

This matches with the first option.

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4 years ago

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1. Marla coloured 1/4 of a picture, and Suman painted some, too. When they were finished, 2/3 of the picture still needed to be

Llana [10]

Answer: 3/7 sorry if wrong

Step-by-step explanation:

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3 years ago

(12 + Brainliest) In need of help, find the value of x and y (problem in the following image)

zvonat [6]

Answer:

a.) x = 5 , y = 10 b.) y = 6, x = not enough information

Step-by-step explanation:

a.)

130 + (4y + 10) = 180

4y + 10 = 50

4y = 40

y = 10

4(10) + 10 = 50

26x + 50 = 180

26x = 130

x = 5

b.)

91 + (20y - 31) = 180

20y - 31 = 89

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y = 6

x = not enough information

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3 years ago

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Step-by-step explanation:

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3 years ago