If cosine, A, equals, start fraction, 4, divided by, 5, end fractioncosA= 5/4 and sine, B, equals, start fraction, 60, divided by, 61, end fractionsinB=
61/60 and angles A and B are in Quadrant I, find the value of tangent, left bracket, A, minus, B, right brackettan(A−B).
