Parviz F. answered • 04/05/14
Tutor
4.8
(4)
Mathematics professor at Community Colleges
(Sec X -1 ) ( 1 +CosX) = tanX
Sin X
SecX - 1 + CosX SecX- COSX = tanX
SINX
SECX -1++1 - Cosx = Tan X
SINX
1/ Cos X - CosX = Tan X
Sin X
( 1 -Cos 2 X ) / Cos X = Tan X
Sin X
Sin2 X / CosX = Tan X
Sin X
Sin X / Cos X = Tan X
Tan X = Tan X
