trig

Given Tangent theta = -5 on 4 and cos theta >0, find sine theta and sec theta

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  1. not familiar with the expession "-5 on 4"
    do you mean -5/4 ?

    if tanØ = -5/4 and cosØ >0
    then we know Ø is in quadrant IV
    by Pythagoras, the hypotenuse of the standard triangle is √41

    sinØ = -5/√41
    sec Ø = √41/4

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