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ICE Princess25 [194]
3 years ago
6

Find cos(2theta) if cos(theta)= 3/4

Mathematics
1 answer:
yuradex [85]3 years ago
6 0
Sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) sin(2theta) would it be 2 x (8/17) cos(2theta) would be 2 x (15/17) tan(2theta) would be 2 x (8/17 divided by 15/17) is this correct?
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Cuando un poligono puede ser concavo o convexo
Verdich [7]
<span>Para que un polígono sea convexo, todos sus ángulos interiores deben ser inferiores a 180 grados</span>
4 0
3 years ago
HELP ME PLEASE <br> solve for the right triangle
ololo11 [35]

Answer:

XYsq = 9sq - 6sq

XY = √45 = 6.7 units

cosZ = 6/9 = .666

Z = 48.25°

sinY = 6/9 = .666

Y = 41.75°

hope it helps :D

7 0
3 years ago
For every one litre of water used to make medicine,199ml of sucrose and 271ml of saline solution are used. Express the amount of
Elenna [48]

Answer:

1000 : 199 : 271

Step-by-step explanation:

A rations a form of comparison between different variables or quantities.

We want to compare how much water, sucrose and saline solution are used to make the medicine.

The amount of water used is 1 L = 1000 mL

The amount of sucrose used is 199 mL

The amount of saline solution used is 271 mL

Therefore, the ratio of water to sucrose to saline solution is:

1000 : 199 : 271

This is the simplest form because 1000, 199 and 271 do not have any common factors.

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=26%20%5Cdiv%204722%20" id="TexFormula1" title="26 \div 4722 " alt="26 \div 4722 " align="absmi
kvv77 [185]
The answer rounded is ~ 0.0055
7 0
3 years ago
7x - 20 = 2x - 3(3x + 2)
kirill [66]

Answer:

7x-20=2x-3(3x+2)

We move all terms to the left:

7x-20-(2x-3(3x+2))=0

We calculate terms in parentheses: -(2x-3(3x+2)), so:

2x-3(3x+2)

We multiply parentheses

2x-9x-6

We add all the numbers together, and all the variables

-7x-6

Back to the equation:

-(-7x-6)

We get rid of parentheses

7x+7x+6-20=0

We add all the numbers together, and all the variables

14x-14=0

We move all terms containing x to the left, all other terms to the right

14x=14

x=14/14

x=1

   

   

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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