proving a trig identity
This is my work so far for proving this trig identity. What should I do next? Is there anything I did wrong thus far?
also, tanpi/2 is undefined... what does that do to the question?
thank you in advance!
Originally Posted by skeske1234
tan(pi/2) is undefined...well, I think you don't need that to solve this problem. If there is something you don't understand, just say it.
So, forget what my resolution. I didn't know that you can use these formulas ( sin(a-b) and cos(a-b). Here, in Portugal, you can't use these formulas to solve the problem.