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

The solution to expand-3cos(2(x-pi/3)) is -3(-1/2 cos(2x)+(sqrt(3))/2 sin(2x))

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expand-3cos(2(x-pi/3))

expand

- 3 cos (2 (x - \frac{π}{3}))

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

Solution steps

- 3 cos (2 (x - \frac{π}{3}))

Expand

2 (x - \frac{π}{3}) : 2 x - \frac{2 π}{3}

= - 3 cos (2 x - \frac{2 π}{3})

Rewrite using trig identities

= - 3 (- \frac{1}{2} cos (2 x) + \frac{3}{2} sin (2 x))

(1 - x) x d x

\frac{1}{w ( w + i ) ^{2}}

\frac{\frac{d}{d x} ( ( 9 t - 6 ) ^{3} )}{( 27 - 3 t ) ^{2}}

((x + h)^{2} + 1) (x ln (x) + e^{x})

2 t (x) x^{^{''}} + (t (x) - 4) x^{^{'}} - x

What is expand-3cos(2(x-pi/3)) ?
The solution to expand-3cos(2(x-pi/3)) is -3(-1/2 cos(2x)+(sqrt(3))/2 sin(2x))