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Juliette [100K]
3 years ago
12

Given that Cos of theta= -0.866, where

frac{\pi }{2}" alt="\frac{\pi }{2}" align="absmiddle" class="latex-formula"> < theta < π, find Sin of Theta
Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0

Answer:

sin(theta) = 0.5

tan(theta) = -0.577

Step-by-step explanation:

Cos theta = -0.866

Theta = 2.617943073

(Because in the second quadrant)

sin(theta) = 0.5

tan(theta) = -0.577

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Roman55 [17]

Answer:

x² - 5x = 14

x = -2   or   x = 7

Step-by-step explanation:

x² - 5x = 14

x² - 5x - 14 = 0

(x+2)(x-7) = 0

x = -2   or   x = 7

4 0
2 years ago
Find 4ab when (a+b)=15 and (a-b)=12
Volgvan
A + b = 15 ..... eq 1
a – b = 12 ...... eq 2

So a = 15 – b
Substitute in eq 2 :

15 – b – b = 12
15 – 2b = 12
–2b = 12 – 15
b = 1.5

So a = 15 – 3/2 = 13.5

4ab = 4 x 13.5 x 1.5 = 81
4 0
3 years ago
Read 2 more answers
Keenan has 28 CDs and 44 DVDs. What is the ratio of DVDs to CDs?
pantera1 [17]
Answer is D.
28:44 is the ratio but you have to simplify it. Divide both by 4. 28 divided by 4 = 7; 44 divided by 4 = 11
4 0
3 years ago
Circle has a radius of 4 and the center is (-4,-8) what is the equation of the circle if I double the radius
wariber [46]

9514 1404 393

Answer:

  (x +4)^2 +(y +8)^2 = 64

Step-by-step explanation:

The equation of a circle with center (h, k) and radius r is ...

  (x -h)^2 +(y -k)^2 = r^2

The circle centered at (h, k) = (-4, -8) with radius 8 has equation ...

  (x +4)^2 +(y +8)^2 = 64

4 0
3 years ago
What is the product?
AleksandrR [38]

Multiply 6 by each number in the matrix:

24, -12, 6

42, 18, 0

The 3rd answer is the correct one.

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