Look at the figure: If tan xº =
a
and cos xº =
what is the value of sin xº?
sin xº = 4b
sin x = b/a
sin x = 4a
sin x =a/b

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?