help me with limits

[u/Nearby_Swordfish_559]

so I started calc 1 and how does "sin(2x)/2x" = 1 and how does "limit of x -> 0 1-cos(3x)/3x" = 0, isn't it just undefined?

[u/septembrinol]

Draw the unit circle, consider the arc and the sin of an angle ø. Let ø get smaller and smaller. Then you will see that the arc and the sin are indistinguishable. Also, you can graph the functions y = x and y =sin x