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Sen/cos + cos /sen =
(Sen^2x +Cos^2x)/sen.cos
1/Sen.cos x
1/Senx . 1/cosx
Cscx . Secx
Tgx.senx+cosx=secx
Sen/cos x senx+cos x=
Sen^2x/cosx +cos x=
(Sen^2x+cos^2x)/cosx=
1/Cos x= secx
Secx=sec=x