i need major help with some problems, i want to be able to figure them out on my own, so please don't give me the answers

okay i got so far, but i don't think i did it right

here's the problem

(cosx)(sec3x+cotx)=tan2x\1-cos2x+sinx\sec2-1

(sinx\cosx)(sinx\cosx)/sin2x+sin\tan

then i crossed out the sins but i don't think i did it right, please help!!