Prove that
8 sin 4 θ = 3 + cos 4 θ - 4 cos 2 θ
You asked:
Prove or disprove that the equation $8 \sin{\left(4 \right)} θ = 3 + \cos{\left(4 \right)} θ - 4 \cos{\left(2 \right)} θ$ is an identity.
Prove that
8 sin 4 θ = 3 + cos 4 θ - 4 cos 2 θ
You asked:
Prove or disprove that the equation $8 \sin{\left(4 \right)} θ = 3 + \cos{\left(4 \right)} θ - 4 \cos{\left(2 \right)} θ$ is an identity.