Verified answer

basically, all of the sin values for ur degrees are square root of 2 over 2, so use square root of 2 over 2 x4, since ur adding it 4 times. so i guess it's 4 times square root of two over two

I can't really type the square root sign on my keyboard, hopefully it made sense. If you knew about special angles and stuff for the sin values, you'll understand.