Answer:
The mean is 20
Step-by-step explanation:
17+19+21+23=80
80 div 4 = 20
Answer:
thats a hard one..
Step-by-step explanation:
Answer:
(t,s)
Step-by-step explanation:
this point has the x value t and the y value s that is missing.
We know that sin2x=2sinxcosx
(search the net for proof if you wish)
So the original equation becomes
2sinxcosx-sinx=0
The two terms both have sinx that can be taken out to get:
sinx(2cosx-1)=0
This is true if sinx=0 or 2cosx-1=0 , rewritten: cosx=1/2
sinx=0 than x=2kπ
cosx=1/2 than x=π/3+2kπ
where k is an integer