Sin = sqrt(2)/2 in intervals of 45 degrees (not counting the axis)
where y is negative, sin(-sqrt2/2) = 225 and 335 degrees
Answer:
4th option
Step-by-step explanation:

To find a percentage, if I am ready your question correctly, would be as simple as dividing the number by 100. For example, finding the percentage of 73.
73/100 = .73%
You could also just move the decimal place over two spots to the left.