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2 October, 00:06

T or F

The value (s) of x when sin (x) = - 1 are x = - 90° and 270°?

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  1. 2 October, 01:10
    0
    True

    Step-by-step explanation:

    Sin (x) = - 1

    Sinx = - sin (90) or sin (180+90)

    Sinx = sin (-90) or sin 270

    x=-90° or 270°
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