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30 April, 02:25

Use the steps to determine the exact value of sin (-135)

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  1. 30 April, 02:35
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    Sin (-135)

    = - sin (90 + 45)

    = sin (90) cos (45) + cos (90) sin (45)

    = (1 x 1/√2) + (0 x 1/√2)

    = - 1/√2

    = - (√2) / 2
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