Rewrite with only sin x and cos x.

cos 3x

cos x - 4 cos x sin2x

-sin3x + 2 sin x cos x

-sin2x + 2 sin x cos x

2 sin2x cos x - 2 sin x cos x

The local farm is advertising a special on fresh picked peaches. the farm charges $4.25 to pick your own peck of peaches and $3.50 for each additional peck you pick. write an equation for the total cost of peaches in terms of the number of pecks. deine your variables. how much does it cost to pick 3 pecks of peaches?

Find the area of the regular hexagon if a side is 20 cm.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?