Simplify the following : cosec(90° - θ) sin(90° - θ) cot(90° - θ)/cos(90° - θ) sec(90° - θ)/cos(90° - θ) sec(90° - θ) tanθ + cotθ/tan(90° - θ)

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Find the value of A if
sin 3A = cos (A - 6°), where 3A and A - 6° are acute angles.