1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AnnyKZ [126]
2 years ago
6

Sin^22x - 2cos2x + 2=0

Mathematics
1 answer:
zhuklara [117]2 years ago
5 0

Answer:

x=πn, n∈Z

Step-by-step explanation:

if sin²2x=1-cos²2x, then

1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

\left[\begin{array}{cc}cos2x+3=0\\cos2x-1=0\\\end{array} \  \ \left[\begin{array}{cc}x \ 'does-not-exist'\\cos2x=1\\\end{array} \  \ 2x=2\pi n, n=Z \  x=\pi n, n=Z

You might be interested in
What is 2.1 with 1repeating as a mixed number
swat32

Answer:

  1. 2 1/10. is the answer i think
4 0
3 years ago
Hey please help me please help please
Airida [17]

1.

a) metres to centimetres :

multiply length by 100

b) metres to millimetres:

multiply length by 1000

c) kilograms to grams:

multiply the mass value by 1000

d) litres to millilitres :

multiply volume by 1000

2.

a) 3 m = 3× 100 = 300 cm

b) 28 cm = 28 × 10 = 280 mm

c) 2.4 km = 2.4 × 1000

= 24 × 10^-1 × 10^3

= 24 × 10^2 =2400 m

d) 485 mm =485 / 10

= 485 / 10 ^1

= 485 × 10 ^-1

= 48.5 cm

e) 35 cm = 35 / 100

= 35 /10^2

= 35 × 10 ^ -2

= 0.35 m

f) 2.4 m = 2.4 / 1000

= 24 × 10 ^-1 / 10^3

= 24 × 10^-1 × 10 ^-3

= 24 × 10 ^ -4

= 0.0024 km

g) 2495 mm = 2495 /1000

= 2495 /10^ 3

= 2495 × 10 ^-3

=2.495 m

4 0
3 years ago
Allison earns a $40,000 base salary plus a commission equal to 15% of your total sales if you are in $70,000 last year what was
Anettt [7]
15/100*70000=$10500
$40000+$10500= $50,000
5 0
3 years ago
Graph the function y = 8 –. Which is the best approximation of a point on the function? (4.4, 3.421) (4.6, 4.232) (5.2, 4.025) (
Trava [24]

Answer: (5.9, 3.781)

6 0
3 years ago
What should be added 0.7 to get 1​
sveticcg [70]

Answer:

0.3

Step-by-step explanation:

x is the number to be added to 0.7 to have a sum of 1.

0.7 + x = 1

x = 1 - 0.7

x = 0.3

5 0
3 years ago
Read 2 more answers
Other questions:
  • A 15-foot flagpole leans slightly, such that it makes an 80° angle with the ground. The shadow of the flagpole is 10 feet long w
    13·1 answer
  • What integer is equivalent to 9 3/2
    7·2 answers
  • Solve for z in the literal equation 5/8 (z + 11) = y.
    8·1 answer
  • Second post. third is coming up
    8·1 answer
  • You enter a relay race. To start, you must run 20 yards to Checkpoint A. You then must turn and run 12 yards to Checkpoint B. La
    8·2 answers
  • What is the value of 72 -4+5?
    13·1 answer
  • Jason invests money in an account paying simple interest. He invests $160 and no money is added or removed from the investment.
    12·2 answers
  • Help this is due today!
    15·1 answer
  • A 55m and 35m broad park is surrounded by a 2.5m wide path.
    13·1 answer
  • If 7.2 and 7.9 are two points on a number line , find the number in the middle of the points​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!