(1 point) For each trigonometric expression A,B,C,D, E, choose the expression from 1,2,3,4,5 that completes a fundamental identity. Enter the appropriate letter (A,B,C,D, or E) in each blank.

1 point For each trigonometric expression ABCD E choose the expression from 12345 that completes a fundamental identity Enter the appropriate letter ABCD or E i class=