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
andrey2020 [161]
3 years ago
15

Cos square 30 degree minus sin square 30 degree is equals to 1 minus 2 sin square 30 degree​

Mathematics
1 answer:
babunello [35]3 years ago
4 0

Answer:

see explanation

Step-by-step explanation:

Not sure quite what you are asking, but

Using the trigonometric identity

cos² x = 1 - sin²x, then

cos²x - sin²x

= 1 - sin²x - sin²x

= 1 - 2sin²x

Thus

cos²30° - sin²30° = 1 - 2sin²30°

You might be interested in
Solve for X: 1/2(4+X)+2=16
Zanzabum
1/2(4+X)+2=16
2+(0.5 x X) + 2 = 16
4 + (0.5 x X) = 16
0.5 x X = 12
X = 24

idk if u understand my working out - message me if u dont
hope it helped tho :)
5 0
3 years ago
What is a multiple of 6,9,18 between 61 and 107
Gala2k [10]
There are two possible answers: 72 and 90.

We can find the answer by looking at the largest number among the three of them: 18. The only multiples of 18 between 61 and 107 are 72 and 90. We can check that both numbers are also multiples of 6 and 9:

90 : 6 = 15
90 : 9 = 10

72 : 6 = 12
72 : 9 = 8
4 0
3 years ago
The numbers 45 28 53 form a pythagorean triple true or false
GarryVolchara [31]
You can verify this by plugging the numbers into the Pythagorean theorem, a^2+b^2=c^2, where c is the hypotenuse (the longest side, in this case 53).

So it would be: 28^2 + 45^2 = 53^2
The equation is true.
2809 = 2809

5 0
3 years ago
What is 12X-4y = -8 written in slope-intercept form?
qwelly [4]

Answer:

y = 3x + 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c

Given

12x - 4y = - 8 ( subtract 12x from both sides )

- 4y = - 12x - 8 ( divide all terms by - 4 )

y = 3x + 2 ← in slope- intercept form

3 0
3 years ago
Solve the x. 1/2(x-2)=5
9966 [12]
1/2(x-2)=5
x-2=10
x=12
3 0
3 years ago
Read 2 more answers
Other questions:
  • BRAINLIEST + POINTS?!<br><br> Can someone help me please explain!
    9·1 answer
  • Graph f(x)=|x−2|+3 .<br><br> Use the ray tool to graph the function.
    7·1 answer
  • Mary can paint a house by herself in 12 hours. john can paint a house by himself in 16 hours. how long would it take them to pai
    5·1 answer
  • What is the area of a circle with a diameter of 15.8 cm?
    8·1 answer
  • What is the greatest prime you must consider to test if 5628 is prime
    10·1 answer
  • Which expressions represent the difference of exactly two expressions?
    6·1 answer
  • What is rotational symmetry
    12·1 answer
  • Another Question in my test
    11·1 answer
  • Are these lines Parallel? <br><br>Super easy, just one pair of lines.​
    10·2 answers
  • Can someone please help me??????​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!