when would you know when to use the double-angle formula and half angle formula? and how can you use the power reducing formula...they confuse me a lot
when would you know when to use the double-angle formula and half angle formula? and how can you use the power reducing formula...they confuse me a lot
or
where
or
use pythagorean identity
or
use half-angle formulas
or
and
use double angle formuals
NOTE the restrictions on m arent neccasary, but if m does not satisfy those conditions it is tricker because you get into radicals and such