Http://prntscr.com/enb5tw you will find the answer there
Answer: OPTION D.
Step-by-step explanation:
For this exercise it is important to remember the following Trigonometric Functions:

Knowing this, we can identify that:

Therefore, the ratio
is equivalent to this Trignometric function:

Answer:
it's false
the true is -1/2
Step-by-step explanation:
-5/2-2+4=-1/2