Answer:I believe the answer is D
Step-by-step explanation:
Cos (A-B) - cos (A+B)
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
=2sinAsinB
Ans: 4
The answer is nonlinear. It goes in a sharp downward curve, whereas a linear function is a straight line.
Answer:
C. Add the equations
Step-by-step explanation:
Adding both the equations will help eliminating 5y.