C and D because 16 × 16= 256 and when multiplying negatives, a negative times a negative is a positive. -16 × -16= 256
We are given
Angles α and β are angles in standard position
and
α terminates in Quadrant II
β terminates in Quadrant I
and we have

we can use triangle and find cos(α)
we get

and we have

we can draw triangle

now, we can use formula

now, we can plug values

now, we can simplify it




...............Answer
Answer:
its the first on 5,3 can you give me brainliest
Step-by-step explanation:
I used the quadratic formula and got x= 4, -6