# angle addition formula in a sentence

- You'll still need an
*angle addition formula*, though . talk ) 13 : 01, 10 February 2013 ( UTC) - The lhs can then be evaluated using the tangent
*angle addition formula*; you should get \ frac { m + n } { 1-mn } after canceling tans with arctans. - It's difficult to find
*angle addition formula*in a sentence.