Lols ppz help1/2 (2 1/2×4 4/5-7 1/2)

If the value of cos330°is√3/2 then find cos 165°.

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)