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24 March, 10:45

Find cos θ if sin θ = - 12/13 and tan θ > 0

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  1. 24 March, 12:43
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    SinФ=-12/13

    cosФ=Base/hypotenus

    (hy) ^2 - (perpendicular) ^2 = (base) ^2=13^2-12^2=5

    cosФ=-5/13
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