Performance Task - Trigonometric Identities: Use trigonometric identities to verify each expression is equal. Please include the trig identities/step-by-step explanation, if possible; I need to show my work, and I'd like to be able to understand how to get to the answer.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Your answer should be “b” i truly hope i could ! good luck (: