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Kazeer [188]
3 years ago
11

What does sin^2 x - cos^2 x equal

Mathematics
1 answer:
Stels [109]3 years ago
6 0

Answer:

-cos(2x)

Step-by-step explanation:

I did trig last year and tutor a trig class this year :)

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Xelga [282]

Answer:

it should be number A hope that helps

7 0
2 years ago
If x = 45, y = 63, and the measure of AC = 4 units, what is the difference in length between segments AB and AD? Round your answ
brilliants [131]

Answer:

  1.17 units

Step-by-step explanation:

From the definition of the sine of an angle, you know ...

  sin(45°) = AC/AB = 4/AB   ⇒   AB = 4/sin(45°) ≈ 5.6569

  sin(63°) = AC/AD = 4/AD   ⇒   AD = 4/sin(63°) ≈ 4.4893

Then the difference AB-AD is ...

  AB -AD = 5.6569 -4.4893 = 1.1676

  AB -AD ≈ 1.17 units

4 0
3 years ago
Need a quick answer please
Over [174]

Answer:

39

Step-by-step explanation:

6x-15+3x+6=90

Simplify: 9x-9=90

9x=99

x=11

3(11)+6

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<H= 39

5 0
3 years ago
Sam is selling T-shirts to raise money for School research project.
iren [92.7K]

Answer:

30

Step-by-step explanation:

Equation y = 3x + 210

if y = 10x

10x = 3x + 210

or, 10x - 3x = 3x + 210 - 3x

or, 7x = 210

or, x = 210 ÷ 7

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8 0
2 years ago
Serial numbers for a product are to be made using 3 letters followed by 3 numbers. If the letters are to be taken from the first
Nesterboy [21]
The first letter has 5 choices, second letter then has 4 choices, the third then has 3 choices.  The first number has 10 choices, second number has 10 choices, third number has 10 choices. 

So to find the total possibilities take 5*4*3*10*10*10 = 60,000
3 0
3 years ago
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