Is prove-cos^2(2θ)=(1+cos(4θ))/8 ?

The answer to whether prove-cos^2(2θ)=(1+cos(4θ))/8 is False

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prove-cos^2(2θ)=(1+cos(4θ))/8

prove

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

False

Solution steps

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

Show that the two sides are not equal

\Rightarrow False

tan^{2} (x) = 2 sin^{2} (x) - 1

tan (- \frac{π}{2} - θ) = cot (θ)

\frac{( 1 + tan ( θ ) )}{( 1 + cot ( θ ) )} = tan (θ)

\frac{1}{sin ^{2} ( θ )} = 1 - tan^{2} (θ)

\frac{1}{( sec ( θ ) ) ^{2}} + \frac{1}{( csc ( θ ) ) ^{2}} = 1

Is prove-cos^2(2θ)=(1+cos(4θ))/8 ?
The answer to whether prove-cos^2(2θ)=(1+cos(4θ))/8 is False