Answer:
X=3
Step-by-step explanation:
1 this is rlly easy but anyways.
What you can do is 7-4 which is 3 so x=3 or you can just use your fingers and count up to 7 and that would also take 3 if you were to start at 4 and to make sure you got it right you can also do 7-3 and that would equal 4 so you answer is x=3
use a calculator / solve for x calculator
the awnser would be a(g(x)=3x2
true
1/2 (sin(x+y)+sin(x-y))
= 1/2 (sin x cos Y + cos x sin y + sin x cos y - cos x sin y)
= 1/2 * 2 sin x cos y
= sin x cos y
The expression is true.
