Step-by-step explanation:
Answer:
2
Step-by-step explanation:
Example case:
The second equation is twice the first, so subtracting that from the second equation yields the identity 0 = 0.
This is an identity. It's an equation that holds true (clearly, 0 is the same as 0) regardless of the values of the variables, which means any pair of numbers
is a solution to the system.
Answer:
Step-by-step explanation:
Firstly, we've to interchange the variables.
Solving for y
Adding 3 to both sides
Multiplying 2 to both sides
Taking cosine on both sides
Dividing both sides by y
Replace y by
=>