Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Two waves are given by `y_1= cos (4t-2x)` and `y_2= sin (4t-2x+pi/4)`. The phrase difference between the two waves is - Sarthaks eConnect

Two waves are given by : `y_1= cos (4t-2x)` and `y_2= sin (4t-2x+pi/4)`. The phrase difference between the two waves is:

`pi/8`

`pi/4`

`(3pi)/4`

`pi/2`