since there is no way to prove what is given
it is apparent that what is being asked for is to combine so there is no + or - in the expressions
each has several possibilities as an answer.
I am having trouble with these three questions.
It says to complete the identity for each of them:
sec theta - (1/sec theta) = ?
csc theta (sin theta + cos theta) = ?
tan theta (cot theta - cos theta) = ?
Any help is appreciated.