Anytime you have a triangle (right triangles are preferred) where at least 2 angle measures and 1 side is known. Or, at least two sides and 1 angle measure.
OR..... 3 sides or three angles are known. So, sines or cosines could be used at almost anytime to find the sides and angles of a triangle!
Answer:
Reflection
Step-by-step explanation:
(x, y) --> (x, -y) is a reflection over the x-axis
It's would be plus haft that number (it's a negative) and the next number would be 0
