Is cos(1/3 pi)=cos(-1/3 pi) ?

The answer to whether cos(1/3 pi)=cos(-1/3 pi) is True

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prove cos(1/3 pi)=cos(-1/3 pi)

prove

cos (\frac{1}{3} π) = cos (- \frac{1}{3} π)

True

Solution steps

cos (\frac{1}{3} π) = cos (- \frac{1}{3} π)

Manipulating left side

cos (\frac{1}{3} π)

Use the negative angle identity:

cos (- x) = cos (x)

= cos (- π \frac{1}{3})

= cos (- \frac{1}{3} π)

We showed that the two sides could take the same form

\Rightarrow True

7 sec (θ) = - 9.2

(cot (x) + tan (x)) cos (x) = csc (x)

cos (- \frac{5 π}{4}) = cos (\frac{3 π}{4})

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

(cos (k) - sec (k))^{2} = tan^{2} (- sin^{2} (k))

Is cos(1/3 pi)=cos(-1/3 pi) ?
The answer to whether cos(1/3 pi)=cos(-1/3 pi) is True