For question one,

Use & to find the angles associated with those values you have been given. Once you've found those angles, you can evaluate the trig functions in the according to which quadrant the angle has been adjust to.

Question 2, graph it over the domain.

Question 3, the consider the equation The amplitude is , the period is , as sine will repeat itself after . The phase shift is .

Question 4, the identities you mention are as follows:

, . Use them to figure out how angle can be found using what you've been given.

Hope this helps!