Is cos(2x)-sin^2(x)=cos^2(x)+3cos(x) ?

The answer to whether cos(2x)-sin^2(x)=cos^2(x)+3cos(x) is False

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prove cos(2x)-sin^2(x)=cos^2(x)+3cos(x)

prove

cos (2 x) - sin^{2} (x) = cos^{2} (x) + 3 cos (x)

False

Solution steps

cos (2 x) - sin^{2} (x) = cos^{2} (x) + 3 cos (x)

Show that the two sides are not equal

\Rightarrow False

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

cos (33 0^{\circ}) = 1 - 2 sin^{2} (16 5^{\circ})

tan^{4} (x) = sec^{4} (x) - sec^{2} (x)

sin^{2} (x) cos (x) - cos (x) = - cos^{3} (x)

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

Is cos(2x)-sin^2(x)=cos^2(x)+3cos(x) ?
The answer to whether cos(2x)-sin^2(x)=cos^2(x)+3cos(x) is False