Need Help in Proving Trig Identities

1. May 14, 2008

coolshah

Hi all

Teacher gave me homework that i am having trouble doing it ..

i need help in these two problems which i can't seem to solve.

how can i prove the following :

@= theta

sec@ + tan@ = tan@sec@
cot@ + cos@

and

sin^2@ - tan@= tan^2@
COS^2@ - cot@

my try is in the attach file

Attached Files:

• work.jpg
File size:
34.6 KB
Views:
82
Last edited: May 14, 2008
2. May 14, 2008

cristo

Staff Emeritus
Well, what have you tried? You must show some work before we can help you. What happened to the homework posting template in which one is supposed to write one's attempts?

3. May 14, 2008

coolshah

Dear,

i have done my other homework problems but except these two. as i stated i can't solve. Due to the fact i don't know where to start. i do know my Fundamental identities.

4. May 14, 2008

coolshah

ok here this is what i tried after what u have said

Attached Files:

• work.jpg
File size:
34.6 KB
Views:
86
Last edited: May 14, 2008