A. 9 only bc only 9 can be equal to 9 if it was absolutely value then the answer would be 9 and -9
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.
Answer:
14
Step-by-step explanation:
Multiply the exponents together
Answer:
2
Step-by-step explanation:

because 
So,
