4 years ago

Find cos theta! Please Help With Explanation! 25 points!

1 answer:

4 0

Let us first find the angle adjacent to θ. To find this we can construct a right triangle by drawing a line segment from the point (-12,5) straight down to the x-axis. Using right triangle trig...

tan(adjacent angle)=5/12

adjacent angle=22.62 degrees

Since the two angles make a linear pair.

θ=180-22.62=157.38 degrees

cos(157.38 degrees) = -0.92

answer: -0.92

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Step-by-step explanation:

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