Remember csc is the inverse of the sin and it looks like this if your find an identity of a csc=1/sin csc became 1/sin and the rest stays the same. (1/sin)cos^2+sin NEXT, you multiply the cos^2 and the 1/sin that makes (Cos^2/sin) +sin After that, you and them with the LCD of sin which makes (cos^2/sin)+(sin^2/sin) Since cos2+sin2 have identity and you make it one 1/sin Finally, Since csc is the inverse of sin then us was CSC, final