Prove that .

use this relationship to show that, if then

I have done the first part:

Let and

then for LHS

now my problem is the second part, after i subsitute into to get , i don't know what to do.

Thanks

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- July 29th 2009, 10:54 PMarzeProve identity
Prove that .

use this relationship to show that, if then

I have done the first part:

Let and

then for LHS

now my problem is the second part, after i subsitute into to get , i don't know what to do.

Thanks - July 29th 2009, 10:58 PMred_dog
Let

Apply again the first identity for and replace back w. - July 29th 2009, 11:21 PMarze
thanks! i did that, and let and

so i had

now i'm stuck, doesn't give a value - July 29th 2009, 11:29 PMred_dog
If then b must be 0.

In this case

Edited. - July 29th 2009, 11:31 PMarze
i thinking something along that line but didn't have any confirmation

thanks! - July 30th 2009, 12:28 AMGrandad
- July 30th 2009, 12:45 AMred_dog