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11 August, 09:34

Simplify sin (-4pi-x)

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  1. 11 August, 10:03
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    Step-by-step explanation:

    hello:

    note:

    for all x in ℝ : 1) sin (x+2kπ) = sinx ... k in Z 2) sin (-x) = - sinx

    in this exercice:

    sin (-4π-x) = sin (-x) = - sinx because : - 4π = 2 (-2) π (form : 2kπ when : k=-2)
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