Answer:
Step-by-step explanation:
cos (2α)*sin (α-β)-cos(β-α)*sin(2α)
cos (β-α)=cos {-(α-β)}=cos (α-β)
[cos (-x)=cos x]
sin(α-β)*cos (2α)-cos (α-β)*sin (2α)=sin (α-β-2α)=sin (-α-β)
=sin {-(α+β)}
=-sin (α+β)
Answer:
Step-by-step explanation:
We can use the process of elimination as
5x + 4y = 24
5(x + 7y = 11) —> 5x + 35y = 55
5x + 4y = 24
-(5x + 35y = 55)
—————————
-31y = -31
-31y/-31 = -31/-31
y=1
Answer: 6.5 and 6 is the 9th term
Step-by-step explanation:
Answer:
see the procedure
Step-by-step explanation:
The situation could be
Alice needs to divide 1/4 pound of meat into three equal parts. What is the weight of each part?
so
Divide 1/4 by 3

The weight of each part is 
2.95 is the cost of each fish sandwich because 14.30 minus 2.50 is 11.80 and 11.80 divided by 4 is 2.95.