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3 years ago

If 3a = cosec x and 3/a = cot x, find the value of 3(a2 - 1/a2)

1 answer:

3 0

$\csc(x) = \frac{r}{y} = \frac{3a}{1} \\ \cot(x) = \frac{x}{y} = \frac{3}{a} \\ y = a = 1 \\ \\ 3( {a}^{2} - \frac{1}{{a}^{2} } ) \\ 3( {1}^{2} - \frac{1}{ {1}^{2} } ) \\ = 0$

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11. Mis the midpoint of QR. Q is at (-8, 2) and M is at (4, -3). Find the coordinates of the endpoint R.

tamaranim1 [39]

Answer:

R(16,-8)

Step-by-step explanation:

if (x1,y1) and (x2,y2) are coordinates of two points and (x,y) the coordinate of midpoint.

then x=(x1+x2)/2

and y=(y1+y2)/2

let coordinates of R are (x,y)

4=(-8+x)/2

8=-8+x

x=8+8=16

-3=(2+y)/2

-6=2+y

y=-6-2=-8

so R is (16,-8)

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3 years ago

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Svetlanka [38]

Answer:

Step-by-step explanation:

84⁰+103⁰+120⁰=307⁰

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have a nice day

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3 years ago

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I need help with making predictions with probability please help me correctly answer these questions.

Semmy [17]

Answer:

1. So the porpotion should be 25/100 = x/120

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2 years ago

What is the area of this triangle in the coordinate plane?

SpyIntel [72]

Answer:2. Given the points A, B, C, D, calculate:

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(f) the point E so that ABCE is a parallelogram.

A(-1, 2, -3), B(4, -1, 0), C(2, 1, -2), D( 3,4,5)

Step-by-step explanation:

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3 years ago

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100 points on the line Two similar rectangles are shown. Which statement is true? A) The area of rectangle B is 1 3 the area of

zimovet [89]

Answer:

Step-by-step explanation:

Area of rectangle A is 2 and area of B is 18. 18 divided by 2 is 9. Therefore rectangle B is 9 times the area of rectangle A

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3 years ago

If 3a = cosec x and 3/a = cot x, find the value of 3(a2 - 1/a2)​

If 3a = cosec x and 3/a = cot x, find the value of 3(a2 - 1/a2)