Is 2cos^2(x)=1+cos(2x) ?

The answer to whether 2cos^2(x)=1+cos(2x) is True

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prove 2cos^2(x)=1+cos(2x)

prove

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

True

Solution steps

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

Manipulating right side

1 + cos (2 x)

Rewrite using trig identities

= 2 cos^{2} (x)

We showed that the two sides could take the same form

\Rightarrow True

80 = arcsin (45.6443 \cdot \frac{sin ( c )}{35})

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

cos (x) (1 + tan (x))^{2} = sec (x) + 2 sin (x)

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

tan (θ) = \frac{sec ( θ )}{csc ( θ )}