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write*

yeah I need help. Im really confused with this

Please can you show me the work?

Trying to learn trigonometry

ok the right hand side can be written...
{cos((A-B)/2)*cos((A+B)/2)}/{sin((A-B)/2)*sin((A+B)/2)}

each term is in the form of the first 2 identities that i posted

It all simplifies down to the left hand side

let me check it out. I will write you if i get lost. Thanks

Yep let me know.

http://www.sosmath.com/trig/Trig5/trig5/trig5.html here are a bunch of identities

got it!

good :)

i had a negative as well

yeah the solution has a - sign

yeah. I dint know how to put that question into english. And your right, i ment units.

ok, I've heard units called dimensions before I was just making sure that's what you meant.

In spanish we say dimension. I supposed it was the same in English. lol