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15) P(-15/17,-8/17) is found on the unit circle. find sin0 and cos0?

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for unit 5 please help me answer this

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  1. cos(theta) is the x co-ordinate on the unit circle.

    cos(theta)= - 15 / 17.

    sin(theta) is the y co-ordinate.

    sin(theta) = - 8 / 17.

    Theta is a quadrant 3 angle, as both ratios are negative.

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