NelWashover
NelWashover NelWashover
  • 11-07-2018
  • Mathematics
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{25 POINTS]
The point (3, -4) is on the terminal side of an angle Ø. What is cos Ø?

A.) - 3/5
B.) 3/5
C.) - 3/4
D.) 3/4
E.) 3

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nethp1020pbgwea nethp1020pbgwea
  • 11-07-2018
The point (3, -4) is on the terminal side of the Ø implies that the hypotenuse has a length of 5, by the pythagorean theorem.
Now recall cosØ = x / r where r is the hypotenuse.
So 
cosØ = 3 / 5.
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