Answer:
Step-by-step explanation:
The values of the cosine function are represented by the axis OX of the goniometric circumference (circumference centered at the origin and of radius 1). Therefore the cosine is zero for the 90º and 270º angles.
So true bro
3. ???? (3 but that's incorrect)
4. 75 D
Use PEMDAS ()^x/+-
It's 9
