Prove the given identity. sec x csc x- sin xsec x cos xcsc x Choose the correct proof below. < Question 10 of 10 This quiz: 25 This question OA. sec x csc x- sin xsec x 1 . 1 cos x sin x 2 1- sin x sin x cos x COS 2 X sin x cos x = cos x CSC X OC. 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 2 cos x = cos x CSC X 2 1 1 - sin x- COS OB. sec xcsc x- sin x sec x cos x sin x 1- sin x sin x cos x COS x sin x cos x = cos xcsc x OD. sec xcsc x- sin x sec x 1 1 cos x sin x sin x cos x 2 1- sin x sin x cos x 2 cosx = cos x CSC X 1 sin x-- cos x E