Is sin^2(x)+cos(2x)=cos(x) ?

The answer to whether sin^2(x)+cos(2x)=cos(x) is False

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prove sin^2(x)+cos(2x)=cos(x)

prove

sin^{2} (x) + cos (2 x) = cos (x)

False

Solution steps

sin^{2} (x) + cos (2 x) = cos (x)

Show that the two sides are not equal

\Rightarrow False

tan (\frac{2 π}{3}) = \frac{\frac{243}{4}}{- \frac{9}{2}}

sec (y) sec (y) = 1

sin (α + β) - sin (α - β) = 2 cos (α) sin (β)

\frac{1 - cos ( 2 a )}{1 + cos ( 2 a )} = tan^{2} (a)

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

Is sin^2(x)+cos(2x)=cos(x) ?
The answer to whether sin^2(x)+cos(2x)=cos(x) is False