We have been working on proving identities and it's a subject I just can't get my brain around. A few of the problems we've been given have made me stumble.
cotx/1+tan(-x) + tanx/1+cot(-x) = cotx + tanx +1
I figure on this one, with using identities, I can get:
cotx/1-tanx + tanx/1-cotx = cotx + tanx +1
But I can't get past there, and I don't even know if that's right.
The other problem is:
sinx + tanx/1 + secx = sinx
With using identities, I can get:
sinx + (sinx/cosx) / 1 + (1/cosx) = sinx
Please see the attached file.
cotx/1+tan(-x) + tanx/1+cot(-x) ...
The solution provides detailed explanations and answer for the problem.