October 2023 1 6 Report
a) sec2x + csc2x = sec2x.csc2x
b) senx.cosx = 1/ (tgx + ctgx)
c) 3 – 2.cos2x = 2.sen2x + 1
d) ctg2x –cos2x = ctg2x . cos2x
e) cos2x –sen2x = 2.cos2x -1
f) 1+ (1/senx) = ctg2x / (cscx -1)
g) (senx / 1-cosx) = (1+cosx) / senx
h) (tgx + secx.tgx) / (1+ secx)
i) (csc2x -1) / ctg2x
j) (sec2x /csc2x)+ sen2x = sec2x – cos2x
k) (csc2x – 1 ).sen2x = cos2x l) ctgx.senx = cos x

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