September 2018 1 39 Report
IDENTIDADES TRIGONOMETRICAS.
AYUDENME PORFAVOR
a) (cos x - sen x)^2 + 2 sen x .cos x = 1
b) 1-2 sen^2 x = 2 cos^2 x - 1
c) (1/1+ sen x)+ (1/1- sen x) = 2 sec^2 x
d) sen^4 x - cos^4 x = 2 sen^2 x-1
e) ( 1/ sen x . cos x) - ctg x = tg x
f) (tgx/ sen x) + ( csec x /tg x) = csec^2 x . sec x
g) (secx/senx) - tg x = ctg x
h) ( 1 +cos x/ senx)+ ( sen x / 1+ cos x) = 2 csec x



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