Solution
Expression : $$(sinA+cosA)(1-sinAcosA)$$
Using, $$sin^2A+cos^2A=1$$
= $$(sinA+cosA)(sin^2A+cos^2A-sinAcosA)$$
Also, we know that : $$x^3+y^3=(x+y)(x^2+y^2-xy)$$
= $$sin^3A+cos^3A$$
=> Ans - (B)
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