Prove that 1+cosa/sina + sina/1+cosa=2coseca

This is different from the first one can someone me

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27

Find the arc length of the semicircle. 7the grade