Question 930588
tan α = -4/3, α in Quadrant II
sin  α  = 4/5, cos α = -3/5 
...........
tan β = 24/7, β in Quadrant III,
sin β = -24/25, cos β = -7/25 
..... Plug and Play
sin(α − β)=  
sin(x - y) = sin x cosy -  cos x sin y
.......Plug and Play
cos(α + β)= 
cos(x - y) = cos x cos y  + sin x sin y
.........Plug and Play
tan(x - y) =  tan x - tan y)/(1- tan x tan y
tan(α − β) = 
..........
(cosx, sinx) Summary Unit Circle
*[illustration wheel_smaller.jpg].