Question

Identidades trigonometricas

•tgx + ctgx = 2 csc 2x

• sex - cos x = 1/2

Answer 1

tgx+ctgx=2csc2x
secx*cscx=2(1/sen2x)
(1/cosx)*(1/senx)= 2(1/2senx*cosx)
1/(cosx*senx)= 1/(cos*senx)