Answer:
Explanation:
According to the unit circle, 
and are the radian measures you are looking for because all <em>y-coordinates</em> are associated with the <em>sine</em> function, so when evaluating, you will arrive at this:
I am joyous to assist you at any time.
Means just trust me I did it
Yes it is. If you convert it to a decimal it will be .8 or .80 (Same thing)
