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Trig

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Given that cos θ = 5/13 and θ is in QIV, find the exact value of
a. y
b. sin θ
c. sec θ
d. tan θ

  • Trig - ,

    If cosØ = 5/13 and Ø is in IV , then using the standard definition of cos Ø = x/r
    we have x=5, r=13, then
    5^2 + y^2 = 13^2
    y^2 = 144
    and in IV ....

    a) y = -12
    b) sinØ = -12/13
    c) secØ = 13/5
    d) tanØ = y/x = -12/5

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