What is simplify-3cos(1/2 x-2pi) ?

The solution to simplify-3cos(1/2 x-2pi) is -3cos(x/2)

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simplify-3cos(1/2 x-2pi)

simplify

- 3 cos (\frac{1}{2} x - 2 π)

- 3 cos (\frac{x}{2})

Solution steps

- 3 cos (\frac{1}{2} x - 2 π)

Rewrite using trig identities

= - 3 cos (\frac{x}{2})

sin (arcsin (\frac{2 x + 1}{3}))

sin (\frac{- πn}{2})

tan (arcsin (x + 2))

cos (α - \frac{π}{2})

cos ((θ - π) - sin (π + θ))

What is simplify-3cos(1/2 x-2pi) ?
The solution to simplify-3cos(1/2 x-2pi) is -3cos(x/2)