Question

csecx(1-senelevado al 2x)secx=ctgx

Answer 1

cscx(1 - sen²x)secx = ctgx

cos²x = 1 - sen²x
cscx = 1 / senx
secx = 1 / cosx

(1 / senx)(cos²x)(1 / cosx) = ctgx
cos²x / (senxcosx) = ctgx
cosx / senx = ctgx
ctgx = ctgx