Find cos(1680°) and sin(1680°). identify the measure of the reference angle.

Reference angle will be

Step-by-step explanation:

We have given

It can be written as

As 240° is lie in the third quadrant

And we know that for third quadrant

Reference angle is given by

So reference angle will be

Now

e) none of the above because the measure of angle cba is 101°

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.