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20-09-2017
Mathematics

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The point (3, -4) is on the terminal side of an angle 0 . What is cos 0 ?

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apologiabiology apologiabiology

20-09-2017

draw it
cos=oposite side/hypothuse

oposite side=y=-4
hypotonuse=distance from (0,0) to (3,-4)
which is [tex]D=\sqrt{3^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5[/tex]

so it would be -4/5

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