Is 1-cos(x)=(1-cos^2(x))/2 ?

The answer to whether 1-cos(x)=(1-cos^2(x))/2 is False

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prove 1-cos(x)=(1-cos^2(x))/2

prove

1 - cos (x) = \frac{1 - cos ^{2} ( x )}{2}

False

Solution steps

1 - cos (x) = \frac{1 - cos ^{2} ( x )}{2}

Show that the two sides are not equal

\Rightarrow False

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

(\frac{1}{2 cot ( x ) ( 1 - cos ^{2} ( x ) )}) = 2 cot (x)

3 sec^{2} (x) - 4 = 0

sin (3 θ) = 3 sin (θ) - 4 sin (3 θ)

(sec^{2} (x) cot (x)) + cot (x) = tan (x)

Is 1-cos(x)=(1-cos^2(x))/2 ?
The answer to whether 1-cos(x)=(1-cos^2(x))/2 is False