Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) If `|veca+vecb|<|veca-vecb|`then the angle between `veca` and `vecb`can lie in the interval - - Sarthaks eConnect

If `|veca+vecb|<|veca-vecb|`then the angle between `veca` and `vecb`can lie in the interval -

`(-pi/2,pi/2)`

`(0,pi)`

`(pi/2,(3pi)/2)`

`(0,2pi)`