Unit Circle Formula
Given a unit circle point (x, y)
x2 + y2 = 1
Plug in x = x and y = 4
x2 + 42 = 1
x2 + 16 = 1
Subtract 16 from each side:
x2 = 1 - 16
x2 = -15
Take the square root of each side:
√x2 = √-15
Final Answer
Not on a unit circle
Given a unit circle point (x, y)
x2 + y2 = 1
x2 + 42 = 1
x2 + 16 = 1
x2 = 1 - 16
x2 = -15
√x2 = √-15
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