a. If sin(A)=-3/5 with A in QIII, and sin(B)=4/5 with B in QII then sin(A+B)= b. If sin(A) = -4/5 with A in QIV, and sin(B) = -3/5 with B in QIII then cos(A+B)= c.If sin(A) = -3/5 with A in QIII, and sin(B) = 4/5 with B in QII then cos(A-B) d. If sin(A) = -4/5 with A in QIII, and sin(B) = -3/5 with B in QIV then sin(A-B)=

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