(Try using a TI-30X2S calculator it helps a lot with fractions)
Answer:
Step-by-step explanation:
REcall that sin(a+b) = sin(a)cos(b)+cos(a)sin(b). Then
sin(a+b)+sin(a-b) = sin(a)cos(b)+cos(a)sin(b) + sin(a)cos(b) -cos(a)sin(b) = 2sin(a)cos(b). Then
sin(a)cos(b) = (1/2)(sin(a+b)+sin(a-b))
So it is false
9/20, i have an app called fraction calculator. works great
Answer:
T=4
Step-by-step explanation:
PV=nrt, where p=8, v=2x, n=2, and R=2x. You are given x=3. Solve for T
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PV=nrt= 8×2(3)=2×2(3)T
8×6=2×6(T)
48=12T
divide both sides 12, BECAUSE YOU WANT TO FIND T
48/12=12T/12
4=T OR T=4 same they are