Is tan(8x)=(8tan(x))/(1-tan^2(x)) ?

The answer to whether tan(8x)=(8tan(x))/(1-tan^2(x)) is False

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prove tan(8x)=(8tan(x))/(1-tan^2(x))

prove

tan (8 x) = \frac{8 tan ( x )}{1 - tan ^{2} ( x )}

False

Solution steps

tan (8 x) = \frac{8 tan ( x )}{1 - tan ^{2} ( x )}

Show that the two sides are not equal

\Rightarrow False

cos (2 x) = 5 - 2 cos (x)

cos (\frac{3 π}{2} \cdot 123) = cos (\frac{π}{2} \cdot 123)

tan (- a) = \frac{cos ( \frac{π}{2} + a )}{cos ( a )}

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

sin (θ) - \frac{1}{sin ( θ )} = cos (θ)

Is tan(8x)=(8tan(x))/(1-tan^2(x)) ?
The answer to whether tan(8x)=(8tan(x))/(1-tan^2(x)) is False