trig

If θ is an angle in standard position and its terminal side passes through the point (20,-21), find the exact value of sec(θ).

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  1. so x = 20 , y = -21 , which is in quad IV
    r^2= 400+441 = 841
    r = √841 = 29

    then cos Ø = 20/29
    sec Ø = 29/20 = 1.45

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  2. If θ is an angle in standard position and its terminal side passes through the point (20,21), find the exact value of \cos\thetacosθ in simplest radical form.

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