Unable to obtain 50 Hertz sine wave in Simulink

To execute my project I need a 50 Hertz sine wave...But when I connected a sine wave function of 50 Hertz to a scope, what I have obtained is not the desired output. I am attaching

the sine wave output seen from the scope.

Answer 1

[Rick Rosson]

Please try zooming in using the horizontally-constrained zoom tool.

[Rohit R Krishnan]

Please see the zoomed upper half of the sine wave...

[Rick Rosson]

What Solver are you using? What is the maximum step size?