The point (5, -3) is reflected over the y-axis. What is the x-coordinate after the reflection?
1 answer:
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For this case what we must do is use the cosine theorem to solve the problem.
We have then:
Where,
a, b, c: are the sides of the triangle.
x: is the angle between the sides a and b of the triangle.
Substituting values we have:
Clearing c we have:
Answer:
option 1
We have then:
Where,
a, b, c: are the sides of the triangle.
x: is the angle between the sides a and b of the triangle.
Substituting values we have:
Clearing c we have:
Answer:
option 1