Prove the given identity. sec xcsc x- sin x sec x cos x csc x Question 8 of 10 > This quiz: 25 This question Choose the correct proof below. A. sec x csc x - sin x sec x = 1 1 cos x sin x sin x cos x 1- sin x sin x cos x cos 2x = cos x csc x 1 - sin x cos x C. sec xcsc x- sin x sec x 1 1 cos x sin x sin x cos x 1- sin x sin x cos x COS 2 x = cos x CSC X 1 OB. sec xcsc x- sin x sec x cos x sin x 1 = 1- sin 2 X = sin x cos x 2 cos x sin x cos x = cos x CSC X D. sec x csc x- sin x sec x 1 = 1 cos x sin x 1- sin x sin x cos x cos 2 x sin x cos x = cos xcsc x 1 sin x+ COS