Answer:
sina
Step-by-step explanation:
Using the cofunction identity
cos(90 - x) = sinx , then
cos(120 - (30 + a) )
= cos(120 - 30 - a)
= cos(90 - a)
= sina
Answer:
Descending order
Step-by-step explanation:

Answer:
42 degrees
Step-by-step explanation:
It’s a good step because you know where you are at in present time as well as looking ahead into the future financially.