SOLUTION: Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x) Prove the identity

Algebra ->  Trigonometry-basics -> SOLUTION: Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x) Prove the identity      Log On


   

Question 889599: Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x)
Prove the identity
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x)
Prove the identity
----------
Sin(x)*tan(x)/cos(x) + 1 = 1/cos^2(x)
Sin^2(x)/cos^2(x) + 1 = 1/cos^2(x)
tan^2 + 1 = sec^2
QED