Find the Cosine Given the Point (8,15)

Problem

cos(θ)* given the point *(8,15)

Solution

1. Identify the coordinates of the given point (x,y) where x=8 and y=15

2. Calculate the radius r using the Pythagorean theorem formula r=√(,x2+y2)

r=√(,8+15)

r=√(,64+225)

r=√(,289)

r=17

3. Apply the trigonometric definition for cosine in terms of coordinates, which is cos(θ)=x/r

cos(θ)=8/17

Final Answer

cos(θ)=8/17

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