Consider the derivation of sin(2x). Where is the error?

Step 2 should read = cos(x)cos(x) – sin(x)sin(x).
Step 2 should read = sin(x)cos(x) – cos(x)sin(x).
Step 3 should read = – 2sin(x)cos(x).
Step 3 should read = 2sin(x)cos(x).

Round 0.866 to the nearest hundredth

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

As a salesperson you get $50/day and $3.60/each sales you make. if you want to make $60 in one day, how many sales would you need need to make ? a 3b 4c 5d 6 show work.