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2019reynolds
15.03.2020 •
Mathematics
I need help understanding how to solve this problem.
1. If on the unit circle C, the distance from P (1, 0) to the point T (5/13, 12/13 ) is x, determine the coordinates of the point at the indicated distance from P.
π+ x
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Ответ:
Explanation:
It is indicated to find the coordinates of the point T (5/13, 12/13) at a distance π + x.
π is an arc of half a circle, i.e. 180º.Then, the distance π+ x means that the point T is rotated 180º.
The rule for the rotation of a point 180º around the origin is:
(x, y) → (-x, - y)Applying that rule to the point T:
(5/13, 12/13) → (-5/13, - 12/13) ← answerОтвет:
D.
Step-by-step explanation:
From the given information we have :
and
Now we need to find :
We make use of trigonometric identities.
This implies that:
The correct choice is:
Ответ: