Answer: see proof below
<u>Step-by-step explanation:</u>
Use the Double Angle Identity: cos 2A = 2cos²A - 1
Use the Difference Identity: cos (A - B) = cosA · cosB + sinA · sinB
Use the Unit Circle to evaluate: cos (π/2) = 0 & sin (π/2) = 1
<u>Proof LHS → RHS</u>
LHS = RHS: sin A = sin A 
Answer:
20 pounds
Step-by-step explanation:
she has 30 dollars, and 1.50 is how much each pound is
we should divide 30 (how much she can spend) by 1.5 (cost of pound) so that we know how many pounds she can buy using all the money.
after we divide, we get a result of 20, so she can buy 20 pounds for 30 dollars.
lets check.
we can multiply 20 (pounds she can buy) by 1.5 (money per pound) and that should get us to 30 dollars.
20*1.5=30
solved, let me know if you have questions or i need to explain more
N3Y+7 can have infinate solutions
Answer:
ans is he bought 4 games
Step-by-step explanation:
You earned $200 so you get some games you get the games and you have 60 dollars left
so u spent 200-60=140 on games
$35 per games
no of games bought=140/35=4
