i have to prove tan 2x - sec 2x = tan (x - pi/4)

well i started with the right side and used identities to simplify it down to tan x - 1/(1 + tan x)

im not sure where to go from here? any suggestions?

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- Apr 25th 2010, 07:05 AMslapmaxwell1prove the identity
i have to prove tan 2x - sec 2x = tan (x - pi/4)

well i started with the right side and used identities to simplify it down to tan x - 1/(1 + tan x)

im not sure where to go from here? any suggestions? - Apr 25th 2010, 08:59 AMrunning-gag
Hi

and

Therefore

- Apr 25th 2010, 09:42 AMmrmohamed
- Apr 25th 2010, 10:31 AMSoroban
Hello, slapmaxwell1!

This is a messy one . . . You're off to a good start!

Quote:

Prove: .

I started with the right side and used identities

. . to simplify it down to: .

I'm not sure where to go from here? Any suggestions?

You had: .

Multiply by

Multiply by

. .

. . . .

We have: .

. . . . . .

- Apr 25th 2010, 10:43 AMArchie Meade
- Apr 25th 2010, 04:18 PMslapmaxwell1
wow i didnt think of that approach...nice! thanks alot..so doing math i have remain open minded? LOL :O)

- Apr 25th 2010, 04:22 PMslapmaxwell1