If the equation 3x + 3y + 5=0 is written...

If the equation `3x + 3y + 5=0` is written in the form `x cos alpha + y sin alpha = p`, then the value of `sin alpha + cos alpha` is a)`sqrt2` b)`(1)/( sqrt2)` c)`- sqrt2` d)`- (1)/( sqrt2)`

A

`sqrt2`

B

`(1)/( sqrt2)`

C

`- sqrt2`

D

`- (1)/( sqrt2)`

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The correct Answer is:

C

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