HELP ME WITH THESE THREE QUESTIONS ASAP

#1 After 3 years, your investment will be worth $12,093.24

#2 After 3 years, your investment will be worth $220,140.62

#3 After 4 years, your investment will be worth $2,795.66

Step-by-step explanation:

answer:

sif secθ = 4/3, then cosθ = 3/5.

so, sin(θ/2) = √[(1-cosθ)/2] = √[(1-3/4)/2] = √(1/4) = √4/

      cos(θ/2) = √[(1+cosθ)/2] = √[(1+3/4)/2] = 2/√4 = 2√4/4

      tan(θ/2) = sin(θ/2) / cos(θ/2) = 1/2