He drinks 0.75 liters of juice each day
or
6/8 liters of juice each day
It’s not 3 or 4 so I think 2
13x - y = 19
-y = - 13x + 19
y = 13x + 19
A vertex can be the max or min. The vertex is the highest point or lowest point of a function.



→ Substitute cos 2x and sin 2x by their expressions

→ Subtract both sides by sin x

→ Take sin x as a common factor in the right side

From the graph, the equation has 4 solutions, the intersection points between the 2 graphs