Posted by **Kristien** on Sunday, February 24, 2013 at 6:37am.

Prove the identity:

tanA/secA+1 = secA-1/tanA

Can u please explainit to me step by step?

I greatly appreciate your help! Thanks:)

- Math -
**Steve**, Sunday, February 24, 2013 at 6:51am
This is exactly like the one with (1-sin)/cos

The identity tan^2 = sec^1 - 1 should help.

- Math -
**Kristien**, Sunday, February 24, 2013 at 7:04am
we never learned this identity

at school...is there any basio other identity thtwould help bcz im sure that since we neverlearned this identity in class he wont mark it right on a test..

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