Where do I start?cotx/secx=cscx-sinx
Always try to find a way to convert cotx, secx, cscx, and tanx into cosx and sinxcotx (1/secx) = (1/sinx) - sinx (cosx/sinx) (cosx) = (1/sinx) - sinxcos²x / sinx = (1- sin²x)/sinxcos²x = 1 - sin²xsin²x + cos²x = 1