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
LuckyWell [14K]
3 years ago
8

Two friends play a game to see if one can spot the true statements when the other gives them a list of truths and lies mixed tog

ether. (These friends are logicians, and they are very particular about formal logic. They think it’s fun.) The first friend challenges the second, saying: “1, I’m not in love with you; 2, Exactly two statements on this list are false; 3, Exactly three statements on this list are false.” Which of these statements is true?
Mathematics
1 answer:
Reika [66]3 years ago
4 0
The first statement is true
You might be interested in
Derive these identities using the addition or subtraction formulas for sine or cosine: sinacosb=(sin(a+b)+sin(a-b))/2
Sergeu [11.5K]

Answer:

The work is in the explanation.

Step-by-step explanation:

The sine addition identity is:

\sin(a+b)=\sin(a)\cos(b)+\cos(a)\sin(b).

The sine difference identity is:

\sin(a-b)=\sin(a)\cos(b)-\cos(a)\sin(a).

The cosine addition identity is:

\cos(a+b)=\cos(a)\cos(b)-\sin(a)\sin(b).

The cosine difference identity is:

\cos(a-b)=\cos(a)\cos(b)+\sin(a)\sin(b).

We need to find a way to put some or all of these together to get:

\sin(a)\cos(b)=\frac{\sin(a+b)+\sin(a-b)}{2}.

So I do notice on the right hand side the \sin(a+b) and the \sin(a-b).

Let's start there then.

There is a plus sign in between them so let's add those together:

\sin(a+b)+\sin(a-b)

=[\sin(a+b)]+[\sin(a-b)]

=[\sin(a)\cos(b)+\cos(a)\sin(b)]+[\sin(a)\cos(b)-\cos(a)\sin(b)]

There are two pairs of like terms. I will gather them together so you can see it more clearly:

=[\sin(a)\cos(b)+\sin(a)\cos(b)]+[\cos(a)\sin(b)-\cos(a)\sin(b)]

=2\sin(a)\cos(b)+0

=2\sin(a)\cos(b)

So this implies:

\sin(a+b)+\sin(a-b)=2\sin(a)\cos(b)

Divide both sides by 2:

\frac{\sin(a+b)+\sin(a-b)}{2}=\sin(a)\cos(b)

By the symmetric property we can write:

\sin(a)\cos(b)=\frac{\sin(a+b)+\sin(a-b)}{2}

3 0
3 years ago
Please explain so I know how to do it
Roman55 [17]
The square root of 2 is irrational. Because 2 is not a perfect square therefore the square root of 2 must be irrational. 1.4 is its approximate to the tenths place. I hope this was helpful
6 0
3 years ago
A box contains 100 colored chips; some are pink and some are blue. Milton chooses a chip at random, records the color, and place
Lena [83]

The approximate number of pink chips is 40. Here's why: what you need to do is set up the problem as shown below. 12 goes above 30 because you have to know what the total number of chips chosen is in order to relate it to 100 chips. From there, all you have to do is cross-multiply and divide (or my middle school teacher used to call it fish.... I'll explain why). First you are going to draw a line from the 100 to the 12 and multiply them. then you are going to curve the line that you will draw from the 12 to the 30 and divide the product of 12 and 100 by 30. Then you will draw a line from the 30 to the X meaning that the quotient that you find from the product of 120 and 100 divided by 30 equals X.  Hope that helps.

12      x    

30   100  

4 0
3 years ago
Read 2 more answers
43. Which function has an x-intercept of 4?
Ulleksa [173]

Answer:

D

Step-by-step explanation:

When f(x) is equal to 0, x=4.

4 0
1 year ago
What is the greatest common factor or 20 and 24
gogolik [260]

Answer:

The greatest common factor is 4 :)

8 0
3 years ago
Read 2 more answers
Other questions:
  • What number is 100,000,000 more than 5,438,724,022
    11·1 answer
  • A jewelry supply shop buys silver chains from a manufacturer for C dollars each,and then sells the chains at a 40% markup . Writ
    7·1 answer
  • Mary, Kevin, and Ahmad served a total of 126
    7·1 answer
  • Help me find the volume
    7·1 answer
  • A cereal box is labeled as containing 16 ounces. Suppose the production line manager tests to determine whether the average weig
    6·1 answer
  • (08.01 MC)
    11·1 answer
  • If I came to work Wednesday through Tuesday and make 13.50 an hour . 9 hours a day . How much would my check be Wednesday
    15·1 answer
  • What are the games and human activities which use trees , or in which trees also
    12·1 answer
  • help please!! Mark the following triangles so that they are congruent by the Side-Side-Side Postulate
    5·1 answer
  • If x+y = -10 and x-y = 2 what is the value of x
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!