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Kay [80]
3 years ago
7

Cot^2 x-csc^2 x=-1 for all values of x. True or false

Mathematics
1 answer:
Arlecino [84]3 years ago
8 0

Answer:

TRUE

Step-by-step explanation:

The well known trigonometry identity states that cot^2(x) + 1 = csc^2(x), rearrangin the equation we have that cot^2(x) - csc^2(x) = -1, which is exactly the expression in the statement. Therefore, the expression is TRUE.

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the length of a rectangle is 8in. more than it’s width. the perimeter of the rectangle is 88in. what are the width and length of
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Step-by-step explanation:

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4 0
4 years ago
Which expression represents -8x^2+54x+140 in factored form?
Elenna [48]

Answer:

D. (x+2)(-8x+70)​

Step-by-step explanation:

-8x^2+54x+140

Factor out -2

-2(4x^2+27x+70)

Factor

-2(x+2)(4x-35)

Option D is the same answer if we multiply -2 in the second term

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7 0
3 years ago
Find the slope of the line whose equation is 8y = 4 - 3x.
Sidana [21]
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5 0
3 years ago
Read 2 more answers
IF l || m , find the values of x and y
egoroff_w [7]

Answer:

x = 8

y = 21

Step-by-step explanation:

(7x + 12)° and (12x - 28)° are alternate interior angles. Alternate interior angles are congruent. Therefore:

(7x + 12)° = (12x - 28)°

Solve for x

7x + 12 = 12x - 28

Collect like terms

7x - 12x = - 12 - 28

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Divide both sides by -5

-5x/-5 = -40/-5

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To find y, plug in the value for x = 8.

12(8) - 28 + 9y - 77 = 180

96 - 28 + 9y - 77 = 180

Combine like terms

- 9 + 9y = 180

Add 9 to both sides

-9 + 9y + 9 = 180 + 9

9y = 189

Divide both sides by 9

9y/9 = 189/9

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5 0
3 years ago
Write a polynomial equation that is best represented by the graph. Please show work and thanks in advance! :)
kipiarov [429]
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multiply this out to get
y=x^3-x^2-2x
I plotted it too

3 0
4 years ago
Read 2 more answers
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