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 
8.75 x 37.5= ? Well all you do is have to line up the decimals and work it out! :) it's simple
Answer:
374
Step-by-step explanation:
11/50=0.22
number/1700=0.22
so 374/1700=0.22 hope that's a choice and helps.
Answer:
f(x) = 2(4^x)+3
this gets you horizontal asymptote of y = 3
Step-by-step explanation: