Question

Verify the Identity: (1/1+sin(x))+(1/1-sin(x))=2Sec^2(x)

Answer 1

sec*

Answer 2

yeah but is 2= 2sec^2(x) equal???

Answer 3

Take a look at this: http://goo.gl/mJivR

Answer 4

ah ha?

Answer 5

Do you understand?

Answer 6

1 1 (1 - sinx) + (1 + sinx) 2
LHS = ---------- + --------- = -------------------- = ------------
1 + sinx 1 - sinx (1 + sinx)(1 - sinx) 1 - sin^2x

2
= ---------- = 2 sec^2x = RHS
cos^2x



Is it clear ????