Trigonometria - Ajuda, pf!!!!?

Se Sen x = 12/13 e 0 <x < π/2, determine √3 . Cotg x.

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  • Sen²x + cos²x = 1

    (12/13)² + cos²x = 1

    144/169 +cos²x = 1

    cos²x = 1 - 144/169

    169cos²x = 169 - 144

    169cos²x = 25

    cos²x = 25 / 169

    cos x = 5 / 13

    cotg x = cos x / sen x

    cotg x = 5/13 / 12/13

    cotg x = 5/13 . 13/12

    cotg x = 65 / 156

    cotg x = 5 / 12

    como pediu √3 . cotg x , entao a resposta é: √3 . 5/12

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