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
rosijanka [135]
3 years ago
14

How to find cos2theta

Mathematics
2 answers:
horrorfan [7]3 years ago
8 0
These are the double angle formulas. What the other person mentioned above is the sum and difference formula.

SSSSS [86.1K]3 years ago
5 0
You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
You might be interested in
Which of the following expressions are equivalent to -x/y
ira [324]

Answer:

-z/e

Step-by-step explanation:

-x/y = -z/e

8 0
3 years ago
Holly is taking out a loan in the amount of $10,000. Her choices for the loan are a 4-year loan at 4% simple interest and a 6-ye
notsponge [240]

Answer:

The difference in the amount of interest she would have to pay for the two loans is $1,400

Step-by-step explanation:

The amount of loan Holly is taking out, P = $10,000

The choices available for the loan are;

1) Loan duration, T₁ = 4-year

Interest rate, R₁ = 4%

2) Loan duration, T₂ = 6-year

Interest rate, R₂ = 5%

For the first choice, we have;

The simple interest, I, given by the formula;

I_1 = \dfrac{P \times  R_1 \times T_1 }{100} = \dfrac{10,000 \times  4 \times 4 }{100} = \$ 1,600

For the second choice, we have;

The simple interest, I, given by the formula;

I_2 = \dfrac{P \times  R_2 \times T_2 }{100} = \dfrac{10,000 \times  5 \times 6 }{100} = \$ 3,000

The difference, D, in the amount of interest she would have to pay for the two loans is therefore;

D = I₂ - I₁ = $3,000 - $1,600 = $1,400

The difference in the amount of interest she would have to pay for the two loans = D = $1,400.

7 0
3 years ago
Read 2 more answers
#6. How do you do it?
bazaltina [42]

Answer:

all work is shown and pictured

6 0
3 years ago
To find the product 3/7 x 4/9 Cameron simplified 3/7 to 1/7 and then mulitiplied the fractions 1/7 and 4/9 to find the product 4
Helga [31]
He was not supposed to simplify. He could have multiplied straight across and got 12/63 and he would simplify that which would be 4/21 im thinking
3 0
3 years ago
Read 2 more answers
Sine theta equals square root of 3 over 2 find theta.
Alexxx [7]
Sin(theeta) = square root(3)/2
theeta = sin inverse [square root (3)/2]
theeta =  60 degrees
as seen from trignometric table
7 0
3 years ago
Other questions:
  • Solve the inequality. Show your work. 6y - 8 = 10
    12·2 answers
  • What is the value of the expression <br> (-1.25)(.5)(4)
    7·1 answer
  • Gina wrote that 4/5 is greater than 0.75. Is Gina correct? Explain why or why not
    6·2 answers
  • What is the equation of a horizontal line passing through the point (-3,8)
    6·1 answer
  • Please help photo attached
    13·1 answer
  • Can you please help me with 10 and 11?
    13·1 answer
  • Anybody please ?????
    14·1 answer
  • A rectangle has a length of x+5 cm and a width of x cm. The perimeter of the rectangle is 50 cm. What is the value of x?
    10·2 answers
  • 3/5(a + 5.25) = 7.35 What does a equal
    7·1 answer
  • An alternating voltage of 240V,50HZ is connected across an impedance of (60-j100) Ω. Determine:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!