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This is the question. Which of the following are identities? A. - sin(-a) = tan a cos (-O() B. sec 0 - sin 0 .

This is the question.

Which of the following are identities? A. - sin(-a) = tan a cos (-O() B. sec 0 - sin 0 . tan 0 = cos 0 C. (sin x + 1) + cos2 x = 2 D sin 0+ cos 0 = tan 0 + 1 cos 0 O B, D O A, B, D O A, B, C O All are identities

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