0
By the reflexive property of equality, a number is equal to itself: a = a. For example, 2 = 2, 3 = 3, -3/4 = -3/4 etc.
Since x is a variable that represent numbers, then x is equal to itself: x = x.
Suppose that x = x is a false statement.
If x = 1, by the substitution property of equality, 1 can replace x.
So we have 1 = 1 which is a true satement. Therefore, x = x cannot be a false statement. Thus, x = x is true.
If: x = x
Then: x-x = 0
Add your answer:
Earn +20 pts
How do you prove tan x plus sin x equals 2 tan x?
This would be a real bear to prove, mainly because it's not true.
Is there any way to prove 7 X 13 equals 28 using 7X7X7... 28?
It is extremely difficult to prove things which are not true.
How can prove that x2 equals 0?
You can't prove it, because it's usually not true.The only time it's true is when x=0 .
How do you prove that x and y are directly proportional with the equation Y equals 8X-3?
11
Prove identity sin4x equals 4sinxcosx times 1 minus 2sin squared x?
sin4x=(4sinxcosx)(1-2sin^2x)
How do you prove tan x plus sin x equals 2 tan x?
This would be a real bear to prove, mainly because it's not true.
Is there any way to prove 7 X 13 equals 28 using 7X7X7... 28?
It is extremely difficult to prove things which are not true.
How can prove that x2 equals 0?
You can't prove it, because it's usually not true.The only time it's true is when x=0 .
How do you prove that x and y are directly proportional with the equation Y equals 8X-3?
11
How do you prove sin x tan x equals cos x?
You can't. tan x = sin x/cos x So sin x tan x = sin x (sin x/cos x) = sin^2 x/cos x.
How do you Prove sin x times sec x equals tan x?
sinx*secx ( secx= 1/cos ) sinx*(1/cosx) sinx/cosx=tanx tanx=tanx
Prove identity sin4x equals 4sinxcosx times 1 minus 2sin squared x?
sin4x=(4sinxcosx)(1-2sin^2x)
Prove that 2 divided by10 equals 2?
Cannot prove that 2 divided by 10 equals 2 because it is not true.
what divided by seven equals eight?
What divided by 7 equals 8? In other words, you have an unknown number (X), and then if you divide that X by 7 you get 8. Then what is that X? The equation to calculate what divided by 7 equals 8 is as follows: X/7 = 8 Where X is the answer. When we solve the equation by multiplying each side by 7, you get get: X = 56 Therefore, the answer to what divided by 7 equals 8 is 56.
How do you prove that xyz equals 1 if x equals logy z and y equals logz x and z equals logx y?
If xyz=1, then it is very likely that x=1, y=1, and z=1. So plug these in. 1=logbase1of1, 1=logbase1of1, 1=logbase1of1. You end up with 1=1, 1=1, and 1=1. That's your proof.
Find -x when x equals 35?
If x equals 35, then -x equals -35.
Prove that tan x equals tan 6x?
It is NOT equal. Try calculating tan x, and tan 6x, for a few values of "x", on your scientific calculator. Perhaps you are supposed to solve an equation, and see FOR WHAT values of "x" the two are equal?
