no way.
you know that
sin(θ-20) = sin(θ)cos(20) - cos(θ)sin(20)
from the addition formula for sine.
the rest is garbage.
Does anybody know how sin(20)=(sin(θ)cos(20))-(cos(θ)sin(20)) becomes sin(θ-20)=sin(20)
1 answer
1 answer