Step-by-step explanation:
if you need any explanation you can ask
Henry buys an item for $4.23. He gives the cashier a $20 bill. How much money should Henry get back?
1 answer:
You might be interested in
7π/12 lies in the second quadrant, so we expect cos(7π/12) to be negative.
Recall that
which tells us
Now,
and so