show-using-demoives-theorem-that-sin-2-cos-2-4-1-8-1-cos4-

Question Number 93367 by Rio Michael last updated on 12/May/20

show using demoives theorem that

\sin^{2} θ \cos^{2} 4 θ = \frac{1}{8} (1 - \cos 4 θ)

Commented by prakash jain last updated on 14/May/20

Please recheck question .

put θ = π / 2

LHS \neq RHS

Commented by Rio Michael last updated on 14/May/20

thank you sir