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7 February, 14:16

If sin theta = - squrt. 3/2 and pi < theta < 3pi/2, what are the values of cos theta and tan theta?

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  1. 7 February, 15:45
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    So this first wants you to find where sin is √3/2 when θ is between π and 3π/2. θ would therefore be located at 2π/3.

    Now plug in the value of θ for cosine:

    cos (2π/3) = - 1/2

    And tangent:

    tan (2π/3) = - √3/3
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