Can someone help me solve this:

tan(a-b)

cosa = -4/5 Lies in Quadrant 3

sinb = 1/3 Lies in Quadrant 1

Can someone help me solve this:

tan(a-b)

cosa = -4/5 Lies in Quadrant 3

sinb = 1/3 Lies in Quadrant 1

tan(a-b)

cosa = -4/5 Lies in Quadrant 3

sinb = 1/3 Lies in Quadrant 1

just plug into the angle diff formula for tan: http://oakroadsystems.com/twt/sumdiff.htm#TanSum