ϕ=ABsinθ\phi=A B \sin \thetaϕ=ABsinθ
ϕ=AB\phi=A Bϕ=AB
ϕ=ABcosθ\phi=A B \cos \thetaϕ=ABcosθ
ϕ=A⃗⋅B⃗\phi=\vec{A} \cdot \vec{B}ϕ=A⋅B