<span>Choose two equations and use them to eliminate one variable.Choose another pair of equations and use them to eliminate the same variable.<span>Use the resulting pair of equations from steps 1 and 2 to eliminate one of the two remaining variables.</span></span>
Answer:
1/2
Step-by-step explanation:
Answer:the answer is 10 min hope this helped:)
Step-by-step explanation:

the the negative angle is -(2π-π/4)= -\frac{7 \pi }{4}