【tan(435°-α)+sin(α-165°)】/【cos(195°+α)sin(105°+α)】=【tan(360°+75°-α)+sin(α-180°+15°)】/【cos(180°+15°+α)sin(90°+15°+α)】
=【tan(75°-α)-sin(α+15°)】/【cos(15°+α)cos(15°+α)】
=【tan(90°-15°-α)-sin(α+15°)】/(3/5)^2
=【cot(-15°-α)-sin(α+15°)】/(3/5)^2
=【cot(15°+α)-sin(α+15°)】/(3/5)^2
=【[sin(15°+α)-sin(α+15°)]/cos(15°+α)】/(3/5)^2
=(5/3)^3=125/27
