What is expand 3sin(2(x-pi/4)) ?

The solution to expand 3sin(2(x-pi/4)) is -3cos(2x)

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expand 3sin(2(x-pi/4))

expand

3 sin (2 (x - \frac{π}{4}))

- 3 cos (2 x)

Solution steps

3 sin (2 (x - \frac{π}{4}))

Expand

2 (x - \frac{π}{4}) : 2 x - \frac{π}{2}

= 3 sin (2 x - \frac{π}{2})

Rewrite using trig identities

= 3 (- cos (2 x))

Remove parentheses:

(- a) = - a

= - 3 cos (2 x)

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

(A e^{- k x} + A e^{k x})^{2}

1 - x^{2} + (π - arccos (x)) x

(x - 2) (x - 1)^{'}

(x + x^{2}) \cdot x ln (x) - x

What is expand 3sin(2(x-pi/4)) ?
The solution to expand 3sin(2(x-pi/4)) is -3cos(2x)