5. Simplify the following to an expression involving a single trig function with no fractions. 1 - sin (t ) 1 + cot(r a. b. sin (?) 1+ tan (?)6. Prove the identities. 1+ cos ( 2 ) Bin ( 20 ) = sin ( x ) 1- cos ( 12) a. csc' (x) - sin*(x) = cos ( x ) cot (x) b. csc ( x ) + sin (x)