26. Given that tan Ø = 2.773 where 0< Ø< 3pie/2 , find the values of sin Ø and cos Ø 27. Given that tan Ø = -1.559 where 3pie/2< Ø< 2/pie, find the values of sin Ø and cos Ø

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

Solve the system of equations. y= 2x y= x^2 - 15

Simplify the expression. -2/5(10+15m-20n)